Tuyen Chon Vo Co Hay

7/21/2019 Tuyen Chon Vo Co Hay

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Trc nghim ha v c Bin son: Quangduongbca

Bi tp n thi i hc

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Chn cu tr li ng nht trong cc cu hi trc nghim mn ha hc di y:1. Nung x mol Fe trong khng kh mt thi gian thu c 16,08 gam hn hp H gm 4 cht

rn, l Fe v 3 oxit ca n. Ha tan ht lng hn hp H trn bng dung dch HNO3long, thu c 672 ml kh NO duy nht (ktc). Tr s ca x l:

a) 0,15 b) 0,21 c) 0,24 d) Khng th xc nh c v khng d kin2. Cho rt chm tng git dung dch HCl vo dung dch Na2CO3. Ta nhn thy:a) C hin tng si bt kh CO2ngay, cho n khi ht Na2CO3. V HCl l mt axit mnh n

y c CO2ra khi mui cacbonat l mui ca axit rt yu H

2CO

3.

b)

Khng c xut hin bt kh v cho t t dung dch HCl nn ch to mui axit NaHCO3.c) Lc u cha thy xut hin bt kh, sau mt lc, khi dng nhiu HCl, mi thy bt kh

thot ra.d) Tt c u khng ng v cn ph thuc vo yu t c un nng dung dch th nghim hay

khng, v nu khng un nng dung dch th s khng thy xut hin bt kh.3. Ha tan hon ton a gam FexOy bng dung dch H2SO4 m c nng va , c cha

0,075 mol H2SO4, thu c b gam mt mui v c 168 ml kh SO2(ktc) duy nht thot ra.Tr s ca b l:

a) 9,0 gam b) 8,0 gam c) 6,0 gam d) 12 gam4. Tr s ca a gam FexOy cu (3) trn l:

a) 1,08 gam b) 2,4 gam c) 4,64 gam d) 3,48 gam5. Cng thc ca FexOy cu (3) l:a) FeO c) Fe2O3 c) Fe3O4 d) Thiu d kin nn khng xc nh c

6. Cho rt t t dung dch Na2CO3vo dung dch HCl. Chn pht biu ng nht:a) Thy c bt kh thot ra.b) Khng c bt kh thot ra lc u, v lc u c to mui axit NaHCO3, mt lc sau mi c

bt kh CO2thot ra do HCl phn ng tip vi NaHCO3.c) Do cho rt t nn CO2to ra thi gian phn ng tip vi Na2CO3trong H2O to mui

axit, nn lc u cha to kh thot ra.d) (b) v (c)7. Cho t t dung dch NH3vo dung dch Al2(SO4)3.

a)

Lc u thy dung dch c, sau khi cho tip dung dch NH3lng d vo th thy dungdch trong, do Al(OH)3lng tnh, b ha tan trong dung dch NH3d.b) Lc u thy dung dch c l do c to Al(OH)3khng tan, sau khi cho dung dch NH3c

d, th thy dung dch trong sut, l do c s to phc cht tan c trong dung dch.c) NH3l mt baz rt yu, n khng tc dng c vi dung dch Al2(SO4)3.d) Tt c u sai.8. Nh t t dung dch Xt vo dung dch Zn(NO3)2, ta nhn thy:a) Thy xut hin kt ta ri tan ngay.b) Lc u dung dch c, khi cho dung dch Xt d vo th thy dung dch tr li trong sut.c) Lc u dung dch c l do c to Zn(OH)2khng tan, sau vi kim d, n to phc

cht [Zn(NH3)4]2+tan, nn dung dch tr li trong.

d)

(a) v (c)9. 2,7 gam mt ming nhm ngoi khng kh mt thi gian, thy khi lng tng thm1,44 gam. Phn trm ming nhm b oxi ha bi oxi ca khng kh l:

a) 60% b) 40% c) 50% d) 80%10.Cho kh CO2vo mt bnh kn cha Al(OH)3.a) C phn ng xy ra v to mui Al2(CO3)3.b) C to Al2(CO3)3lc u, sau vi CO2c d s thu c Al(HCO3)3.c) Khng c phn ng xy ra.d) Lc u to Al2(CO3)3, nhng khng bn, n t phn hy to Al(OH)3v CO2.


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Bi tp n thi i hc

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11.X l mt kim loi. Ha tan ht 3,24 gam X trong 100 ml dung dch NaOH 1,5M, thu c4,032 lt H2(ktc) v dung dch D. X l:

a) Zn b) Al c) Cr d) K12. Nu thm 100ml dung dch HCl 2,1M vo dung dch D cu (11), thu c m gam chtkhng tan. Tr s ca m l:

a) 9,36 gam b) 6,24 gam c) 7,02 gam d) 7,8 gam13. vi, vi sng, vi ti c cng thc ln lt l:

a) CaCO3, CaO, Ca(OH)

2 b) CaCO

3, Ca(OH)

2, CaO

c) CaO, Ca(OH)2, CaCO3 d) CaO, CaCO3, Ca(OH)214. Tch Ag ra khi hn hp Fe, Cu, Ag th dng dung dch no sau y?

a) HCl b) NH3 c) Fe(NO3)3 d) HNO3m c15. Ha tan hon ton 2,52 gam kim loi M trong dung dch H2SO4long to thnh 6,84 gammui sunfat. M l kim loi no?

a) Al b) Zn c) Mg d) Fe16. Kh hon ton mt oxit st nguyn cht bng CO d nhit cao. Kt thc phn ng,khi lng cht rn gim i 27,58%. Oxit st dng l:

a) Fe2O3 b) Fe3O4 c) FeO d) C 3 trng hp (a), (b), (c) u tha bi17. Chn cu tr li ng.

Tnh oxi ha ca cc ion c xp theo th t gim dn nh sau:a) Fe3+> Cu2+> Fe2+> Al3+> Mg2+ b) Mg2+> Al3+> Fe2+> Fe3+> Cu2+c) Al3+> Mg2+> Fe3+> Fe2+> Cu2+ d) Fe3+> Fe2+> Cu2+> Al3+> Mg2+

18. Hn hp kim loi no sau y tt c u tham gia phn ng trc tip vi mui st (III)trong dung dch?

a) Na, Al, Zn b) Fe, Mg, Cu c) Ba, Mg, Ni d) K, Ca, Al19. Ha tan hn hp hai kh: CO2v NO2vo dung dch KOH d, thu c hn hp cc muino?

a) KHCO3, KNO3 b) K2CO3, KNO3, KNO2c) KHCO3, KNO3, KNO2 d) K2CO3, KNO3

20. Cho hn hp gm Ba, Al2O3v Mg vo dung dch NaOH d, c bao nhiu phn ng dng

phn t c th xy ra?a) 1 b) 2 c) 3 d) 421. Trng hp no sau y khng xy ra phn ng?

a) Dung dch (NH4)2CO3+ dung dch Ca(OH)2 b) Cu + dung dch (NaNO3+ HCl)c) NH3 + Cl2 d) Dung dch NaCl + I2

22. Cho 0,25 mol CO2tc dng vi dung dch cha 0,2 mol Ca(OH)2. Khi lng kt ta thuc l:

a) 10 gam b) 20 gam c) 15 gam d) 5 gam23. Ion no sau y va c tnh kh va c tnh oxi ha?

a) Cl- b) Fe2+ c) Cu2+ d) S2-24. Cho dung dch NaOH lng d vo 100 ml dung dch FeCl2c nng C (mol/l), thu c

mt kt ta. em nung kt ta ny trong chn khng cho n khi lng khng i, thu cmt cht rn, em ha tan ht lng cht rn ny bng dung dch HNO3long, c 112cm3kh

NO (duy nht) thot ra (ktc). Cc phn ng xy ra hon ton. Tr s ca C l:a) 0,10 b) 0,15 c) 0,20 d) 0,05

25. Cho mt lng mui FeS2tc dng vi lng d dung dch H2SO4long, sau khi kt thcphn ng, thy cn li mt cht rn. Cht rn ny l:

a) FeS2cha phn ng ht b) FeS c) Fe2(SO4)3 d) S26. Cho mt inh st lung d vo 20 ml dung dch mui nitrat kim loi X c nng 0,1M.Sau khi phn ng xy ra hon ton, tt c kim loi X to ra bm ht vo inh st cn d, thu


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c dung dch D. Khi lng dung dch D gim 0,16 gam so vi dung dch nitrat X lc u.Kim loi X l:

a) ng (Cu) b) Thy ngn (Hg) c) Niken (Ni) d) Mt kim loi khc27. Cho bit Thy ngn c t khi bng 13,6. Pht biu no sau y khng ng cho thy ngn

(Hg)?a) Hai th tch bng nhau gia hi thy ngn v khng kh th hi thy ngn nng hn

khng kh 13,6 ln.b) Khi lng ring ca thy ngn l 13,6 kg/lt.c) Thy ngn nng hn nc 13,6 ln. d) Thy ngn l mt cht lng rt

nng.28. Cho hn hp hai kim loi Bari v Nhm vo lng nc d. Sau th nghim, khng cn

cht rn. Nh vy:a) Ba v Al b ha tan ht trong lng nc c d.b) S mol Al nh hn hai ln s mol Ba. c) S mol Ba bng s mol

Al.d) S mol Ba nh hn hoc bng hai ln s mol Al

29. Hn hp A gm hai kim loi kim hai chu k lin tip nhau. Ha tan 0,37 gam hn hpA trong nc d, thu c dung dch X. Cho 100 ml dung dch HCl 0,4M vo dung dch X,

c dung dch Y. trung ha va lng axit cn d trong dung dch Y, cn thm tipdung dch NaOH c cha 0,01 mol NaOH. Hai kim loi kim trn l:a) Li-Na b) Na-K c) K-Rb d) Rb-Cs

30. Ha tan ht 3,53 gam hn hp A gm ba kim loi Mg, Al v Fe trong dung dch HCl, c2,352 lt kh hiro thot ra (ktc) v thu c dung dch D. C cn dung dch D, thu cm gam hn hp mui khan. Tr s ca m l:a) 12,405 gam b) 10,985 gam c) 11,195 gam d) 7,2575 gam

31. Cn ly bao nhiu gam dung dch H2SO4 m c c sn (c nng 97,5%) v khilng nc pha c 2 lt dung dch H2SO437,36% (c t khi 1,28) (l dung dch axitcn cho vo bnh acqui)?a) 980,9 gam; 1 579,1 gam b) 598,7 gam; 1 961,3 gam

c) 1120,4 gam; 1 439,6 gam d) Tt c u khng ph hp32. Dung dch H2SO4cho vo bnh acqui trn (dung dch H2SO437,36%, t khi 1,28) c nng mol/l l:a) 2,98M b) 4,88M c) 3,27M d) 6,20M

33. Cc cht no c th cng tn ti trong mt dung dch?a) (NH4)2CO3; K2SO4; Cu(CH3COO)2 b) Zn(NO3)2; Pb(CH3COO)2; NaClc) HCOONa; Mg(NO3)2; HCl d) Al2(SO4)3; MgCl2; Cu(NO3)2

34. Ha tan hon ton 1,84 gam hn hp hai kim loi Mg v Fe bng dung dch HCl. Chnpht biu ng.a) Th tch kh H2thu c ln hn 736 ml (ktc)b) Th tch kh H2nh hn 1 717 ml (ktc)

c) S mol kh hiro thu c nm trong khong 0,033 mol n 0,077 mold) Tt c u ng35. Dung dch Ca(OH)20,1M trung ha va dung dch HNO30,05M. Nng mol/l ca

dung dch mui sau phn ng trung ha l (Coi th tch dung dch khng i khi trn chungnhau):a) 0,02M b) 0,01M c) 0,03M d) Khng d kin tnh

36. Cho hn hp hai kh NO2v CO2vo lng d dung dch xt, thu c dung dch c hatan cc cht:a) NaNO3; Na2CO3; NaOH; H2O b) NaHCO3; NaNO2; NaNO3; NaOH; H2Oc) Na2CO3; NaNO3; NaNO2; NaOH; H2O d) Tt c u cha y cc cht


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37. 44,08 gam mt oxit st FexOyc ha tan ht bng dung dch HNO3long, thu c dungdch A. Cho dung dch NaOH d vo dung dch A, thu c kt ta. em nung lng ktta ny nhit cao cho n khi lng khng i, thu c mt oxit kim loi. Dng H2 kh ht lng oxit ny th thu c 31,92 gam cht rn l mt kim loi. FexOyl:a) FeO b) Fe2O3 c) Fe3O4 d) S liu cho khng thch hp, c th FexOyc ln tp cht

38. Khng c dung dch cha:a) 0,2 mol K+; 0,2 mol NH4

+; 0,1 mol SO32-; 0,1 mol PO4

3-

b) 0,1 mol Pb2+; 0,1 mol Al3+; 0,3 mol Cl-; 0,2 mol CH3COO-

c) 0,1 mol Fe3+; 0,1 mol Mg2+; 0,1 mol NO3-; 0,15 mol SO42-d) Tt c u ng

39. Dung dch H2SO44,5M c khi lng ring 1,26 g/ml, c nng phn trm l:a) 35% b) 30% c) 25% d) 40%

40. Ha tan ht hn hp hai kim loi kim th vo nc, c 1,344 lt H 2(ktc) thot ra v thuc dung dch X. Th tch dung dch HCl 1M cn trung ha va dung dch X l:a) 12 ml b) 120 ml c) 240 ml d) Tt c u sai

41. 61,6 gam vi sng (ch gm CaO) ngoi khng kh kh mt thi gian. Sau em hatan vo lng nc d, dung dch thu c trung ha va 2 lt dung dch HCl 1M. Phntrm CaO b CO2ca khng kh phn ng l:

a) 5,57% b) 8,25% c) 9,09% d) 10,51%42. Km photphua tc dng vi nc, thu c:a) Axit photphor (H3PO3) b) Axit photphoric (H3PO4)c) Photphin (PH3) d) Khng phn ng

43. S ion OH-c trong 2 lt dung dch Ba(OH)2pH = 12 l:a) 2.1018 b) 2.10-2 c) 12,04.1019 d) 1,204.1022

44. Khi lng ring ca axetilen ktc l:a) 0,896 g/ml b) 1,16 g/ml c) 1,44 g/ml d) Tt c u sai

45. Vng cng nh bch kim ch b ha tan trong nc cng toan (vng thy), l dungdch gm mt th tch HNO3m c v ba th tch HCl m c. 34,475 gam thi vng cln tp cht tr c ha tan ht trong nc cng toan, thu c 3,136 lt kh NO duy

nht (ktc). Phn trm khi lng vng c trong thi vng trn l:a) 90% b) 80% c) 70% d) 60%46. Nguyn t no c bn knh ion nh hn bn knh nguyn t tng ng?

a) Clo b) Lu hunh c) Neon d) Natri47. Phn ng nhit nhm l phn ng:

a) Nhm b oxi ha to nhm oxit khi un nng trong khng kh.b) Ion nhm b kh to nhm kim loi catot bnh in phn khi in phn nhm oxit

nng chy.c) Nhm y c kim loi yu hn n ra khi oxit kim loi nhit cao.d) Nhm y c cc kim loi yu hn n ra khi dung dch mui.

48. ng v l hin tng:

a) Cc nguyn t ca cng mt nguyn t nhng c khi lng khc nhau.b) Cc nguyn t c cng s th t nguyn t Z (s hiu), nhng c s khi A khc nhau.c) Cc nguyn t c cng s proton, nhng khc s neutron (ntron)d) Tt c u ng.

49. Cho lung kh CO i qua m gam Fe2O3un nng, thu c 39,2 gam hn hp gm bncht rn l st kim loi v ba oxit ca n, ng thi c hn hp kh thot ra. Cho hn hpkh ny hp th vo dung dch nc vi trong c d, th thu c 55 gam kt ta. Tr s cam l:a) 48 gam b) 40 gam c) 64 gam c) Tt c u sai, v s khng xc nh c.


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50. Cho lung kh H2c d i qua ng s c cha 20 gam hn hp A gm MgO v CuO nungnng. Sau khi phn ng hon ton, em cn li, thy khi lng cht rn gim 3,2 gam.Khi lng mi cht trong hn hp A l:a) 2gam; 18gam b) 4gam; 16gam c) 6gam; 14gam; d) 8gam; 12gam

51. Xem phn ng: ZnO + X

to

Zn + XO

X c th l:

a) Cu b) Sn c) C d) Pb52. Qu trnh to in (chiu thun) v qu trnh sc in (chiu nghch) ca acqui ch l:

Pb + PbO2 + H2SO4 PbSO4 + H2O2 22 Cht no b kh trong qu trnh to in?a) Pb b) PbO2 c) H2SO4 d) SO4

2-/H+53. Phn ng xy ra trong pinNiken Caimi (Ni-Cd) trong qu trnh to in l:

2NiO(OH) + Cd + 2H2O 2Ni(OH)2+ Cd(OH)2Cht no b oxi ha trong qu trnh sc in (l qu trnh nghch ca qu trnh to in)?a) Ni(OH)2 b) Cd(OH)2 c) OH

- d) C hai cht Ni(OH)2v Cd(OH)254. em nung 116 gam qung Xierit (cha FeCO3v tp cht tr) trong khng kh (coi nh

ch gm oxi v nit) cho n khi lng khng i. Cho hn hp kh sau phn ng hp thvo bnh ng dung dch nc vi c ha tan 0,4 mol Ca(OH)2, trong bnh c to 20 gamkt ta. Nu un nng phn dung dch, sau khi lc kt ta, th thy c xut hin thm ktta na. Hm lng (Phn trm khi lng) FeCO3c trong qung Xierit l:a) 50% b) 90% c) 80% d) 60%

55. Xem phn ng: Br2 + 2KI 2KBr + I2a) KI b oxi ha, s oxi ha ca n tng ln b) KI b oxi ha, s oxi ha ca n gim xungc) KI b kh, s oxi ha ca n tng ln d) KI b kh, s oxi ha ca n gim xung

56. Trong phn ng oxi ha kh:a) S in t c bo ton (S e-cho bng s e-nhn) b) in tch c bo tonc) Khi lng c bo ton d) Tt c u ng

57. Khi cho 5,4 gam kim loi nhm phn ng hon ton vi dung dch H2SO4m c, nng to kh SO2thot ra th lng kim loi nhm ny trao i bao nhiu in t?a) cho 0,2 mol in t b) nhn 0,6 mol in tc) cho 0,4 mol in t d) Tt c u sai

58. Thc hin phn ng nhit nhm hon ton m gam Fe2O3vi 8,1 gam Al. Ch c oxit kimloi b kh to kim loi. em ha tan hn hp cc cht thu c sau phn ng bng dungdch NaOH d th c 3,36 lt H2(ktc) thot ra. Tr s ca m l:a) 16 gam b) 24 gam c) 8 gam d) Tt c u sai

59. Xem phn ng: aCu + bNO3-+ cH+ dCu2++ eNO + fH2O

Tng s cc h s (a + b + c + d + e + f) nguyn, nh nht, phn ng trn cn bng, l:a) 18 b) 20 c) 22 d) 24

60. Sc 2,688 lt SO2(ktc) vo 1 lt dung dch KOH 0,2M. Phn ng hon ton, coi th tchdung dch khng i. Nng mol/l cht tan trong dung dch thu c l:a) K2SO30,08M; KHSO30,04M b) K2SO31M; KHSO30,04Mc) KOH 0,08M; KHSO30,12M d) Tt c u khng ng

61. Khi lng tinh th ng (II) sunfat ngm nc (CuSO4.5H2O) cn ly pha c 250ml dung dch CuSO40,15M l:a) 6,000 gam b) 9,375 gam c) 9,755 gam d) 8,775 gam

62. Cn thm bao nhiu gam CuSO4.5H2O vo 200 gam dung dch CuSO45% thu cdung dch 10%?a) 17,35 gam b) 19, 63 gam c) 16,50 gam d) 18,52 gam


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63.Mt dung dch c pH = 5, nng ion OH-trong dung dch ny l:a) 10-5mol ion/l b) 9 mol ion/l c) 5.10-9mol ion/l d) Tt c u sai

64. Cho 624 gam dung dch BaCl210% vo 200 gam dung dch H2SO4(c d). Lc b kt ta,ly dung dch cho tc dng vi lng d dung dch Pb(CH3COO)2, thu c 144 gam ktta. Nng % ca dung dch H2SO4lc u l:a) 24,5% b) 14,7% c) 9,8% d) 37,987%

65. Cho mt hp cht ion hirua ha tan trong nc th thu c:a) Mt dung dch axit v kh hiro. b) Mt dung dch axit v kh oxi.c) Mt dung dch baz v kh hiro. d) Mt dung dch baz v kh oxi.

66. Cho 3,2 gam bt lu hunh (S) vo mt bnh kn c th tch khng i, c mt t cht xctc rn V2O5(cc cht rn chim th tch khng ng k). S mol O2cho vo bnh l 0,18mol. Nhit ca bnh lc u l 25C, p sut trong bnh l p 1. To mi la t chyht lu hunh. Sau phn ng gi nhit bnh 442,5C, p sut trong bnh by gi p2gpi p sut p1. Hiu sut chuyn ha SO2to SO3l:a) 40% b) 50% c) 60% d) 100%

67. M l mt kim loi. Cho 1,56 gam M tc dng ht vi kh Cl2, thu c cht rn c khilng nhiu hn so vi kim loi lc u l 3,195 gam. M l:a) Mg b) Cr c) Zn d) Cu

68. em nung 3,4 gam mui bc nitrat cho n khi lng khng i, khi lng cht rn cnli l:a) Vn l 3,4 gam, v AgNO3khng b nhit phn b) 2,32 gamc) 3,08 gam d) 2,16 gam

69. Trn 100 ml dung dch KOH 0,3M vi 100 ml dung dch HNO3c pH = 1, thu c 200ml dung dch A. Tr s pH ca dung dch A l:a) 1,0 b) 0,7 c) 13,3 d) 13,0

70. Phn trm khi lng oxi trong phn chua (Al2(SO4)3.K2SO4.24H2O) l:a) 67,51% b) 65,72% c) 70,25% d) Mt tr s khc

71. Ha tan Fe2(SO4)3vo nc, thu c dung dch A. Cho dung dch A tc dng vi dungdch Ba(NO3)2d, thu c 27,96 gam kt ta trng. Dung dch A c cha:

a) 0,08 mol Fe3+

b) 0,09 mol SO42-

c) 12 gam Fe2(SO4)3 d) (b), (c)72. Xem phn ng:FexOy + (6x-2y)HNO3(m c)

0t xFe(NO3)3 + (3x-2y)NO2 + (3x-y)H2O

a) y phi l mt phn ng oxi ha kh, FexOyl cht kh, n b oxi ha to Fe(NO3)3.b) Trong phn ng ny, HNO3phi l mt cht oxi ha, n b kh to kh NO2.c) y c th l mt phn ng trao i, c th HNO3khng ng vai tr cht oxi ha.d) (a) v (b)

73. Ha tan hon ton 15 gam CaCO3vo m gam dung dch HNO3c d, thu c 108,4 gamdung dch. Tr s ca m l:a) 93,4 gam b) 100,0 gam c) 116,8 gam d) Mt kt qu khc

74. Xem phn ng: FeS2 + H2SO4(m c, nng) Fe2(SO4)3 + SO2 + H2O

Tng s cc h s nguyn nh nht, ng trc mi cht trong phn ng trn, phn ngcn bng cc nguyn t l:a) 30 b) 38 c) 46 d) 50

75. Chn cch lm ng: pha long dung dch H2SO498% nhm thu c 196 gam dungdch H2SO410%, mt hc sinh thc hin nh sau:a) Ly 176 gam H2O vo 20 gam dung dch H2SO498%.b) Ly 20 gam dung dch H2SO498% cho t t vo 176 gam H2O.c) (a) v (b) u ng.d) Tt c u ly s lng khng ng.


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76. Trn dung dch NaOH 40% vi dung dch NaOH 10% thu c dung dch 30%. Khilng mi dung dch cn ly em trn thu c 60 gam dung dch NaOH 30% l:a) 20 gam dd NaOH 40%; 40 gam dd NaOH 10%b) 40 gam dd NaOH 40%; 20 gam dd NaOH 10%c) 30 gam dd NaOH 40%; 30 gam dd NaOH 10%d) 35 gam dd NaOH 40%; 25 gam dd NaOH 10%

77. Cho 2,7 gam Al vo 100 ml dung dch NaOH 1,2M. Sau khi kt thc phn ng, thu cdung dch A. Cho 100 ml dung dch HCl 1,8M vo dung dch A, thu c m gam kt ta.Tr s ca m l:a) 7,8 gam b) 5,72 gam c) 6,24 gam d) 3,9 gam

78. Dung dch axit clohiric m c c nng 12M v cng l dung dch HCl c nng 36%. Khi lng ring ca dung dch ny l:a) 1,22 g/ml b) 1,10g/ml c) 1,01 g/l d) 0,82 g/l

79. Dung dch hn hp B gm KOH 1M Ba(OH)20,75M. Cho t t dung dch B vo 100 mldung dch Zn(NO3)21M, thy cn dng t nht V ml dung dch B th khng cn kt ta. Trs ca V l:a) 120 ml b) 140 ml c) 160 ml d) 180 ml

80. Chn cu tr li ng

CaCO3 + BaCl2

BaCO3 + CaCl2 (1)K2CO3 + Ba(NO3)2 BaCO3 + 2KNO3 (2)CuS + 2NaOH Cu(OH)2 + Na2S (3)CuSO4 + 2NaOH Cu(OH)2 + Na2SO4 (4)a) C bn phn ng (1), (2), (3), (4) u xy ra B.Cc phn ng (1), (2), (4) xy

raD. Cc phn ng (2), (3), (4) xy ra C. Cc phn ng (2), (4) xy ra

81. Cho 100 ml dung dch KOH 3,5M vo 100 ml dung dch AlCl31M. Sau khi phn ngxong, thu c m gam kt ta. Tr s ca m l:a) 3,9 gam b) 7,8 gam c) Kt ta b ha tan ht d) Mt tr s khc

82. Ch c dng nc, nhn bit c tng kim loi no trong cc b ba kim loi sau y?

a) Al, Ag, Ba b) Fe, Na, Zn c) Mg, Al, Cu d) (a), (b)83. Ha tan ht 2,055 gam mt kim loi M vo dung dch Ba(OH)2, c mt kh thot ra v khi

lng dung dch sau phn ng tng 2,025 gam. M l:a) Al b) Ba c) Zn d) Be

84. Nguyn t no c bn knh ion ln hn bn knh nguyn t tng ng?a) Ca b) Ag c) Cs d) Tt c u khng ph hp

85. Ha tan hon ton m gam bt kim loi nhm vo mt lng dung dch axit nitric rt longc d, c 0,03 mol kh N2 duy nht thot ra. Ly dung dch thu c cho tc dng vilung d dung dch xt, un nng, c 672 ml duy nht mt kh (ktc) c mi khai thot ra.Cc phn ng xy ra hon ton. Tr s ca m l:a) 3,24 gam b) 4,32 gam c) 4,86 gam d) 3,51 gam

86. Vi phn ng: FexOy 2yHCl (3x-2y)FeCl2 + (2y-2x)FeCl3 + yH2OChn pht biu ng:a) y l mt phn ng oxi ha khb) Phn ng trn ch ng vi trng hp FexOy l Fe3O4c) y khng phi l mt phn ng oxi ha khd) (b) v (c) ng

87. Mt dung dch MgCl2cha 5,1% khi lng ion Mg2+. Dung dch ny c khi lng ring

1,17 g/ml. C bao nhiu gam ion Cl-trong 300 ml dung dch ny?a) 13,0640 gam b) 22,2585 gam c) 26,1635 gam d) 52,9571 gam

88. Xem phn ng: FeS2 + H2SO4(, nng) Fe2(SO4)3 + SO2 + H2O


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Bi tp n thi i hc

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8

a) FeS2b oxi ha to Fe2(SO4)3 b) FeS2b oxi ha to Fe2(SO4)3vSO2

c) H2SO4b oxi ha to SO2 d) H2SO4 oxi ha FeS2to Fe3+v SO4

2-89. Th t nhit si tng dn ca cc hirohalogenua nh sau:

a) HF < HCl < HBr < HI b) HCl < HBr < HI < HFc) HCl < HF < HBr < HI d) HI < HBr < HCl < HF

90. Cho 0,69 gam Na vo 100 ml dung dch HCl c nng C (mol/l), kt thc phn ng, thuc dung dch A, cho lng d dung dch CuSO

4vo dung dch A, thu c 0,49 gam

mt kt ta, l mt hiroxit kim loi. Tr s ca C l:a) 0,2 b) 0,3 c) 0,1 d) Mt gi tr khc

91. C bao nhiu in t trao i trong qu trnh ru etylic b oxi ha to axit axetic?a) 1 b) 2 c) 3 d) 4

92. Cht no s b ha tan nhiu trong axit mnh hn so vi trong nc?a) PbF2 b) PbCl2 c) PbBr2 d) PbI2

93. pH ca dung dch NaH2AsO40,1M gn vi tr s no nht? Cho bit axit arsenic H3AsO4c cc tr s Ka1= 6,0.10

-3 ; Ka2= 1,1.10-7 ; Ka3= 3,0.10

-12a) 1,6 b) 2,8 c) 4,0 d) 4,8

94. em nung nng mt lng qung hematit (cha Fe2O3, c ln tp cht tr) v cho lung

kh CO i qua, thu c 300,8 gam hn hp cc cht rn, ng thi c hn hp kh thotra. Cho hp th hn hp kh ny vo bnh ng lng d dung dch xt th thy khi lngbnh tng thm 52,8 gam. Nu ha tan ht hn hp cht rn trong lng d dung dchHNO3 long th thu c 387,2 gam mt mui nitrat. Hm lng Fe2O3 (% khi lng)trong loi qung hematit ny l:a) 2O% b) 40% c) 60% d) 80%

95. Kh hay hi cht no c tr s khi lng ring 546C; 1,5 atm bng vi khi lng ringca kh oxi iu kin tiu chun?a) N2 b) NH3 c) SO2 d) SO3

96. Ngi ta trn m1gam dung dch cha cht tan A, c nng phn trm l C1, vi m2gamdung dch cha cng cht tan, c nng phn trm l C2, thu c dung dch c nng

phn trm C. Biu thc lin h gia C, C1, C2, m1, m2l:a)

CC

CC

m

m

=

1

2

2

1 b)CC

CC

m

m

=

2

1

2

1 c)21

2211

mm

CmCmC

= d) (a), (c)

97. Ngi ta trn m1gam dung dch HNO356% vi m2gam dung dch HNO320% thuc dung dch HNO340%. T l gia m1: m2l:a) 4 : 5 b) 5 : 4 c) 10 : 7 d) 7 : 10

98. Thu c cht no khi un nh mui amoni nitrit?a) N2, H2O b) N2O; H2O c) N2; O2; H2O d) H2, NH3; O2

99. Trn m1gam dung dch NaOH 10% vi m2gam dung dch NaOH 40% thu c 60gam dung dch 20%. Tr s ca m1, m2l:a) m1= 10g; m2= 50g b) m1= 40g; m2= 20gc) m1= 35g; m2 = 25g d) m1= 45g; m2= 15g

100. H s nguyn nh nht ng trc ion OH- phn ng sau y...Cl2 + ...OH

- ...Cl- + ...ClO3- + ...H2O

cn bng s nguyn t cc nguyn t l:a) 3 b) 6 c) 12 d) 18

101. em nung 1,50 gam mt mui cacbonat mt kim loi cho n khi lng khng i, thuc 268,8 cm3cacbon ioxit (ktc). Kim loi trong mui cacbonat trn l:a) Ca b) Mn c) Ni d) Zn

102. em nung m gam hn hp A cha hai mui cacbonat ca hai kim loi u thuc phnnhm chnh nhm II trong bng h thng tun hon, thu c x gam hn hp B gm cc


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Bi tp n thi i hc

9

9

cht rn v c 5,152 lt CO2thot ra. Th tch cc kh u o ktc. em ha tan ht xgam hn hp B bng dung dch HCl th c 1,568 lt kh CO 2 thot ra na v thu cdung dch D. em c cn dung dch D th thu c 30,1 gam hn hp hai mui khan. Trs ca m l:a) 26,80 gam b) 27,57 gam c) 30,36 gam d) 27,02 gam

103. Mt hp cht ion cha 29,11% Natri; 40,51% Lu hunh v 30,38% Oxi v khi lng.Anion no c cha trong hp cht ny?a) S

2O

3

2- b) SO4

2- c) S4O

6

2- d) SO3

2-104. Khi lng NaCl cn thm vo 250 gam dung dch NaCl 10% thu c dung dch

25% :a) 20 gam b) 30 gam c) 40 gam d) 50 gam

105. Th tch nc (D = 1g/ml) cn thm vo 50 ml dung dch H 2SO492% (D = 1,824 g/ml) thu c dung dch H2SO412% l:a) 500 ml b) 528 ml c) 608 ml d) 698 ml

106. Ngi ta trn V1 lt dung dch cha cht tan A c t khi d1vi V2 lt dung dch chacng cht tan c t khi d2 thu c V lt dung dch c t khi d. Coi V = V1+ V2. Biuthc lin h gia d, d1, d2, V1, V2l:

a)21

2211

VV

dVdVd

+

+= b)

1

2

1

2

dd

dd

V

V

= c)dd

dd

V

V

=

1

2

2

1 d) (a), (c)

107. Th tch nc cn thm vo dung dch HNO3c t khi 1,35 thu c 3,5 lt dung dchHNO3c t khi 1,11 l: (Coi s pha trn khng lm thay i th tch)a) 2,4 lt b) 1,1 lt c) 0,75 lt d) Mt tr s khc

108. Khi lng tinh th FeSO4.7H2O cn dng thm vo 198,4 gam dung dch FeSO45%nhm thu c dung dch FeSO415% l:a) 65,4 gam b) 50 gam c) 30,6 gam d) Tt c u khng ng

109. Cho 7,04 gam kim loi ng c ha tan ht bng dung dch HNO3, thu c hn hphai kh l NO2v NO. Hn hp kh ny c t khi so vi hiro bng 18,2. Th tch mi khthu c ktc l:a) 0,896 lt NO2; 1,344 lt NO b) 2,464 lt NO2; 3,696 lt NO

c) 2,24 lt NO2; 3,36 lt NO d) Tt c s liu trn khng ph hp vi d kin u bi110. Mu vt cht no di y khng nguyn cht?

a) NaCl (lng) b) Ru etylic c) H2O (rn) d) Ru 40111. Cho m gam bt kim loi ng vo 200 ml dung dch HNO32M, c kh NO thot ra.

ha tan va ht cht rn, cn thm tip 100 ml dung dch HCl 0,8M vo na, ng thicng c kh NO thot ra. Tr s ca m l:a) 9,60 gam b) 11,52 gam c) 10,24 gam d) u bi cho khng ph hp

112. Cho m gam hn hp gm ba kim loi l Mg, Al v Fe vo mt bnh kn c th tch khngi 10 lt cha kh oxi, 136,5C p sut trong bnh l 1,428 atm. Nung nng bnh mtthi gian, sau a nhit bnh v bng nhit lc u (136,5C), p sut trong bnhgim 10% so vi lc u. Trong bnh c 3,82 gam cc cht rn. Coi th tch cc cht rn

khng ng k. Tr s ca m l:a) 2,46 gam b) 2,12 gam c) 3,24 gam d) 1,18 gam

113. Trn 100 ml dung dch MgCl21,5M vo 200 ml dung dch NaOH c pH = 14, thu c mgam kt ta. Tr s ca m l:a) 8,7 gam b) 5,8 gam c) 11,6 gam d) 22,25 gam

114. Sc V lt kh CO2(ktc) vo 2 lt dung dch Ca(OH)20,05M, thu c 7,5 gam kt ta.Cc phn ng xy ra hon ton. Tr s ca V l:a) 1,68 lt b) 2,80 lt c) 2,24 lt hay 2,80 lt d) 1,68 lt hay 2,80 lt

115. Sc kh SO2dung dch xa th:a) Kh SO2ha tan trong nc ca dung dch xa to thnh axit sunfur.


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Bi tp n thi i hc

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10

b) Kh SO2khng phn ng, t ha tan trong nc ca dung dch sa, thot ra, c mixc (mi hc).

c) SO2y c CO2ra khi mui carbonat, ng thi c s to mui sunfit.d) Tt c u khng ph hp.

116. Cho 42 gam hn hp mui MgCO3, CuCO3, ZnCO3tc dng vi dung dch H2SO4long,thu c 0,25 mol CO2, dung dch A v cht rn B. C cn dung dch A, thu c 38,1gam mui khan. em nung lng cht rn B trn cho n khi lng khng i th thuc 0,12 mol CO

2v cn li cc cht rn B. Khi lung ca B v B l:

a) 10,36 gam; 5,08 gam b) 12,90 gam; 7,62 gamc) 15, 63 gam; 10,35 gam d) 16,50 gam; 11,22 gam

117. Cho NaHCO3tc dng vi nc vi trong c d, phn ng xy ra hon ton, tng h snguyn nh nht ng trc cc cht phn ng ny c s cn bng s nguyn t ccnguyn t l:a) 7 b) 10 c) 5 d) Mt tr s khc

118. Cho lung kh hiro c d qua ng s c ng 9,6 gam bt ng (II) oxit un nng. Chodng kh v hi thot ra cho hp th vo bnh B ng mui ng (II) sunfat khan c d ng (II) sunfat khan hp th ht cht m n hp th c. Sau th nghim, thy khilng bnh B tng thm 1,728 gam. Hiu sut ng (II) oxit b kh bi hiro l:

a) 50% b) 60% c) 70% d) 80%119. Thc hin phn ng nhit nhm vi 3,24 gam Al v m gam Fe3O4. Ch c oxit kim loi bkh to kim loi. em ha tan cc cht thu c sau phn ng nhit nhm bng dung dchBa(OH)2c d th khng thy cht kh to ra v cui cng cn li 15,68 gam cht rn. Ccphn ng xy ra hon ton. Tr s ca m l:a) 18,56 gam b) 10,44 gam 8,12 gam d) 116,00 gam

120. Xt cc nguyn t v ion sau y:

Ar18

Cl17

Cl17

S16

S16

S16

2

K19 K19

39

35 35 32 32 32

39

Ca2040

Ca20

40 Ca2040 2

(1): (2): (3): (4): (5): (6):

(7): (8): (9): (10): (11):

40

Nguyn t, ion c s in t bng s in t ca nguyn t Argon l:a) (1), (3), (5), (8), (10) b) (1), (3), (6), (8), (11)c) (1), (11), (8), (3), (9) d) (1), (2), (4), (7), (9)

121. Gi s gang cng nh thp ch l hp kim ca St vi Cacbon v St ph liu ch gmSt, Cacbon v Fe2O3. Coi phn ng xy ra trong l luyn thp Martin l:Fe2O3 + 3C

0t 2Fe + 3CO

Khi lng St ph liu (cha 40% Fe2O3, 1%C) cn dng khi luyn vi 4 tn gang5%C trong l luyn thp Martin, nhm thu c loi thp 1%C, l:a) 1,50 tn b) 2,93 tn c) 2,15 tn d) 1,82 tn

122. Ion CO32-cng hin din chung trong mt dung dch vi cc ion no sau y?

a) Na+

; NH4+

; Mg2+

b) H+

; K+

; NH4+

c) K+

; Na+

; OH-

d) Li+

; Ba2+

; Cl-

123. Khi cho dung dch canxi bicacbonat (c d) tc dng vi dung dch xt, tng h snguyn nh nht ng trc cc cht trong phn ng phn ng ny cn bng s nguynt cc nguyn t l:a) 5 b) 6 c) 7 d) 8

124. Cho V lt (ktc) CO2hp thu ht vo dung dch nc vi c ha tan 3,7 gam Ca(OH)2, thuc 4 gam kt ta trng. Tr s ca V l:a) 0,896 lt b) 1,344 lt c) 0,896 lt v 1,12 lt d) (a) v (b)

125. Cho 1,12 lt kh sunfur (ktc) hp thu vo 100 ml dung dch Ba(OH) 2 c nng C(mol/l), thu c 6,51 gam kt ta. Tr s ca C l:


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Bi tp n thi i hc

11

11

a) 0,3M b) 0,4M c) 0,5M d) 0,6M


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Bi tp n thi i hc

12

12

126. Trn 100 ml dung dch H2SO40,12M vi 300 ml dung dch KOH c pH = 13. Thu c 400ml dung dch A. Tr s pH ca dung dch A gn vi tr s no nht di y?

a)11,2 b) 12,2 c) 12,8 d) 5,7127. Cht no c tnh kh tt nht trong cc cht sau y?

a) CuO b) SiO2 c)NO

2 d) SO

2

128. em nung hn hp A, gm hai kim loi: x mol Fe v 0,15 mol Cu, trong khng kh mtthi gian, thu c 63,2 gam hn hp B, gm hai kim loi trn v hn hp cc oxit ca chng.em ha tan ht lng hn hp B trn bng dung dch H2SO4m c, th thu c 0,3 mol SO2.Tr s ca x l:

a) 0,7 mol b) 0,6 mol c) 0,5 mol d) 0,4 mol129. Cho cc cht: Al, Zn, Be, Al2O3, ZnO, Zn(OH)2, CrO, Cr2O3, CrO3, Ba, Na2O, K, MgO, Fe.Cht no ha tan c trong dung dch Xt?

a) Al, Zn, Al2O3, Zn(OH)2, BaO, MgO b) K, Na2O, CrO3, Be, Bac) Al, Zn, Al2O3, Cr2O3, ZnO, Zn(OH)2 d) (b), (c)

130. Ion icromat Cr2O72-, trong mi trng axit, oxi ha c mui Fe2+to mui Fe3+, cn

icromat b kh to mui Cr

3+

. Cho bit 10 ml dung dch FeSO4phn ng va vi 12 ml dungdch K2Cr2O70,1M, trong mi trng axit H2SO4. Nng mol/l ca dung dch FeSO4l:a) 0,52M b) 0,62M c) 0,72M d) 0,82M

131. Cho 2,24 gam bt st vo 100 ml dung dch AgNO30,9M. Khuy u phn ng xy rahon ton. Dung dch sau phn ng c:a) 7,26 gam Fe(NO3)3 b) 7,2 gam Fe(NO3)2 c) c (a) v (b) d) Mt tr s khc132. Cho t t dung dch HCl 35% vo 56,76 ml dung dch NH316% (c khi lng ring 0,936gam/ml) 20C, cho n khi trung ha va , thu c dung dch A. Lm lnh dung dch A v0C th thu c dung dch B c nng 22,9% v c m gam mui kt ta. Tr s ca m l:

a) 2,515 gam b) 2,927 gam c) 3,014 gam d) 3,428 gam133. Mt hc sinh thc hin hai th nghim sau:

- Ly 16,2 gam Ag em ha tan trong 200 ml dung dch HNO3 0,6M, thu c V lt NO (ktc)- Ly 16,2 gam Ag em ha tan trong 200 ml dung dch hn hp HNO30,6M H2SO4 0,1M,thu c V lt NO (ktc).

Cc phn ng xy ra hon ton, coi H2SO4long phn ly hon ton to 2H+v SO4

2-.a) V = V = 0,672 lt b) V = 0,672 lt; V = 0,896 ltc) Hai th tch kh trn bng nhau, nhng khc vi kt qu cu (a)d) Tt c u khng ph hp134. Cho 4,48 lt hi SO3(ktc) vo nuc, thu c dung dch A. Cho vo dung dch A 100 mldung dch NaOH 3,5M, thu c dung dch B. C cn dung dch B, thu c hn hp R gm haicht rn. Khi lng mi cht trong R l:

a) 6,0 g; 21,3 g b) 7,0 g; 20,3 g c) 8,0 g; 19,3 g d) 9,0 g, 18,3 g

135. Sc V lt CO2(ktc) vo 1 lt dung dch hn hp Ca(OH)20,02M v NaOH 0,1M. Sau khikt thc phn ng, thu c 1,5 gam kt ta trng. Tr s ca V l:a) 0,336 lt b) 2,800 lt c) 2,688 lt d) (a), (b)

136. Tnh cht ha hc c bn ca kim loi l:a) Tc dng vi phi kim to muib) Tc dng vi axit thng thng to mui v kh hiroc) y c kim loi yu hn ra khi dung dch muid) Kim loi c tnh kh, n b oxi ha to hp cht ca kim loi

137. Cho dung dch cha x mol NaAlO2tc dng vi dung dch cha y mol HCl. T l T= phinh th no thu c kt ta?


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Bi tp n thi i hc

13

13

a) T = 0,5 b) T = 1 c) T > d) T Cu2+> Fe3+ b) Fe3+> Ag+> Cu2+> Fe2+c) Ag+> Fe3+> Cu2+ d) Ag+> Fe3+> Cu2+> Fe2+

152. S in phn v s in ly c g khc bit?a) Ch l hai t khc nhau ca cng mt hin tng l s phn ly to ion ca cht c th phn ly

thnh ion c ( l cc mui tan, cc baz tan trong dung dch, cc cht mui, baz, oxit kimloi nng chy)

b) Mt ng l s oxi ha kh nh hin din dng in, mt ng l s phn ly to ion ca cht cth phn ly thnh ion.

c) S in phn l s phn ly ion nh dng in, cn s in ly l s phn ly ion nh dung mi haynhit lng (vi cc cht in ly nng chy)

d) Tt c u khng ng.153. Cu hnh electron ca ion Fe3+l:

a) 1s

2

2s

2

2p

6

3s

2

3p

6

4s

2

3d

3

b) 1s

2

2s

2

2p

6

3s

2

3p

6

3d

3

4s

2

c) (a) hay (b) d) Tt c u sai154. Ngi ta pha long dung dch H2SO4c pH = 1 bng cch thm nc ct vo thu cdung dch c pH = 3. Ngi ta pha long dung dch H2SO4bao nhiu ln?

a) 10 ln b) 20 ln c) 100 ln d) 200 ln155. Mt ngi thm nc ct vo dung dch NaOH c pH = 14 nhm thu c dung dch c pH= 13. Ngi pha long dung dch NaOH bao nhiu ln?

a) 5 ln b) 10 ln c) 50 ln d) 100 ln156. Tch s ion ca nc 25C l [H+][OH-] = 10-14. in ly ca nc (% phn ly ion canc) 25C l:

a) 1,8.10-7% b) 0,018% c) 10-5% d) Tt c u sai

157. Tch s ion ca nc 25C bng 10-14

. Trung bnh trong bao nhiu phn t nc th s cmt phn t nc phn ly ion 25C ?a) Khong 10 triu phn t b) Khong 555 triu phn tc) Khong 1 t phn t d) Khong trn 5 555 phn t

158. pH ca dung dch HCl 10-7M s c gi tr nh th no?a) pH = 7 b) pH > 7 c) pH < 7 d) Tt c u khng ph hp

159. Tr s chnh xc pH ca dung dch HCl 10-7M l:a) 7 b) 6,79 c) 7,21 d) 6,62

160. Cho 200 ml dung dch NaOH pH = 14 vo 200 ml dung dch H 2SO40,25M. Thu c 400 mldung dch A. Tr s pH ca dung dch A bng bao nhiu?

a) 13,6 b) 1,4 c) 13,2 d) 13,4

161. T cc cp oxi ha kh: Al3+

/Al; Cu2+

/Cu; Zn2+

/Zn; Ag+

/Ag, trong nng cc mui bngnhau, u bng 1 mol/lt, s pin in ha hc c th to c ti a bng bao nhiu?a) 3 b) 5 c) 6 d) 7

162. Nhng mt ming kim loi X vo 200 ml dung dch AgNO31M, sau khi kt thc phn ng,khi lng ming kim loi c khi lng tng 15,2 gam. Cho bit tt c kim loi bc to ra ubm vo ming loi X. Kim loi X l:

a) ng b) St c) Km d) Nhm163. Nhn ca nguyn t no c cha 48 ntron (neutron)?

a) b) c) d)


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Bi tp n thi i hc

15

15

164. Hai kim loi A, B u c ha tr II. Ha tan ht 0,89 gam hn hp hai kim loi ny, trong dungdch HCl. Sau phn ng thu c 448 ml kh H2(ktc). Hai kim loi A, B l:

a) Mg, Ca b) Zn, Fe c) Ba, Fe d) Mg, Zn165. Lc tng tc no khin cho c s to lin kt ha hc gia cc nguyn t to phn t?

a) Gia cc nhn nguyn t b) Gia cc in tc) Gia in t vi cc nhn nguyn t d) Gia proton v nhn nguyn t

166. Cho x mol Al v y mol Zn vo dung dch cha z mol Fe 2+v t mol Cu2+. Cho bit 2t/3 < x .Tm iu kin ca y theo x,z,t dung dch thu c c cha 3 loi ion kim loi. Cc phn ngxy ra hon ton.a) y < z -3x/2 +t b) y < z-3x + t c) y < 2z + 3x t d) y < 2z 3x + 2t

167. Cho a mol Mg v b mol Fe vo dung dch cha c mol Cu2+v d mol Ag+. Sau khi phn nghon ton, dung dch thu c c cha hai ion kim loi. Cho bit a>d/2 . Tm iu kin ca btheo a, c, d c kt qu ny.a) b = b) b c a c) b c a + d) b > c a

168. in phn 100 ml dung dch NaCl 0,5M, dng in cc tr, c mng ngn xp, cng dngin 1,25 A, thu c dung dch NaOH c pH = 13. Hiu sut in phn 100%, th tch dungdch coi nh khng thay i. Thi gian in phn l:

a) 12 pht b) 12 pht 52 giy c) 14 pht 12 giy d) 10 pht 40 giy

169. Ion no c bn knh ln nht trong cc ion di y?a) Na+ b) K+ c) Mg2+ d) Ca2+170. Ha tan ht 17,84 gam hn hp A gm ba kim loi l st, bc v ng bng 203,4 ml dung

dch HNO320% (c khi lng ring 1,115 gam/ml) va . C 4,032 lt kh NO duy nht thotra (ktc) v cn li dung dch B. em c cn dung dch B, thu c m gam hn hp ba muikhan. Tr s ca m l:

a) 51,32 gam b) 60,27 gam c) 45,64 gam d) 54,28 gam171. Dn chm V lt (ktc) hn hp hai kh H2v CO qua ng s ng 20,8 gam hn hp gmba oxit l CuO, MgO v Fe2O3, un nng, phn ng xy ra hon ton. Hn hp kh, hi thot rakhng cn H2cng nh CO v hn hp kh hi ny c khi lng nhiu hn khi lng V lt hnhp hai kh H2, CO lc u l 4,64 gam. Trong ng s cn cha m gam hn hp cc cht rn. Tr

s ca V l:a) 5,600 lt b) 2,912 lt c) 6,496 lt d) 3,584 lt172. Tr s ca m cu (171) trn l

a) 12,35 gam b) 14,72 gam c) 15,46 d) 16,16 gam

173. C bao nhiu tr s di lin gia C vi C trong phn t ?a) 3 b) 4 c) 2 d) 11

174. Mt ngi iu ch kh Clo bng cch cho axit Clohiric m c tc dng vi Manganioxit un nng. Nu phn ng hon ton, khi lng dung dch HCl 36% cn dng iu chc 2,5 gam kh Clo l bao nhiu?

a) 5,15 gam b) 14,28 gam c) 19,40 gam d) 26,40 gam

175. Khng th dng NaOH rn lm kh cc kh m no di y?a) CH3NH2; N2 b) NH3; CO c) H2; O2 d) CO2; SO2176. Dng KOH rn c th lm kh cc cht no di y?

a) SO3; Cl2 b) (CH3)3N; NH3c) NO2; SO2 d) Kh hirosunfua (H2S) kh hiroclorua (HCl)

177. in phn dung dch NaCl, dng in cc tr, c vch ngn, thu c 200 ml dung dch cpH = 13. Nu tip tc in phn 200 ml dung dch ny cho n ht kh Clo thot ra anot th cnthi gian 386 giy, cng dng in 2 A. Hiu sut in phn 100%. Lng mui n c trongdung dch lc u l bao nhiu gam?



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178. Cho 72,6 gam hn hp ba mui CaCO3, Na2CO3v K2CO3tc dng ht vi dung dch HCl,c 13,44 lt kh CO2thot ra ktc. Khi lng hn hp mui clorua thu c bng bao nhiu?

a) 90 gam b) 79,2 gam c) 73,8 gam d) Mt tr s khc179. Mt ming vng hnh hp dp c kch thc 25,00mm x 40,00mm x 0,25mm c khi lng4,830 gam. Khi lng ring ca vng bng bao nhiu?

a) 11,34g/ml b) 13,3g/ml c) 19,3g/ml d) 21,4g/ml180. Crom c khi lng nguyn t bng 51,996. Crom c 4 nguyn t ng v trong t nhin.Ba nguyn t ng v trong bn nguyn t ng v ca Crom l: 50Cr c khi lng nguyn t49,9461 (chim 4,31% s nguyn t); 52Cr c khi lng nguyn t 51,9405 (chim 83,76% snguyn t); v 54Cr c khi lng nguyn t 53,9589 (chim 2,38% s nguyn t). Khi lngnguyn t ca ng v cn li ca Cr bng bao nhiu?

a) 54,9381 b) 49,8999 c) 50,9351 d) 52,9187181. Cho dung dch KHSO4vo lng d dung dch Ba(HCO3)2.

a) Khng hin tng g v khng c phn ng ha hc xy rab) C si bt kh CO2, to cht khng tan BaSO4, phn dung dch c K2SO4v H2O

c) C si bt kh, to cht khng tan BaSO4, phn dung dch c cha KHCO3v H2Od) C to hai cht khng tan BaSO4, BaCO3, phn dung dch cha KHCO3, H2O

182. Ion M2+c cu hnh electron l 1s22s22p63s23p6

a)Tr s Z ca M

2+

bng 20 b) Tr s Z ca M

2+

bng 18c) Nguyn t M th 20, chu k 3 d) M l mt kim loi c tnh kh mnh, cn ionM2+c tnh oxi ha mnh183. Khi sc t t kh CO2lng d vo dung dch NaAlO2, thu c:

a) Lc u c to kt ta (Al(OH)3), sau kt ta b ha tan (to Al(HCO3)3) v NaHCO3b) C to kt ta (Al(OH)3), phn dung dch cha Na2CO3v H2Oc) Khng c phn ng xy rad) Phn khng tan l Al(OH)3, phn dung dch gm NaHCO3v H2O

184. KMnO4trong mi trng axit (nh H2SO4) oxi ha FeSO4to Fe2(SO4)3, cn KMnO4bkh to mui Mn2+. Cho bit 10 ml dung dch FeSO4nng C (mol/l) lm mt mu va 12

ml dung dch KMnO40,1M, trong mi trng axit H2SO4. Tr s ca C l:a) 0,6M b) 0,5M c) 0,7M d) 0,4M

185. Dung dch no khng lm i mu qu tm?

a) Na2CO3 b) NH4Cl c) d) NaNO3

186. Dung dch mui X khng lm i mu qu tm, dung dch mui Y lm i mu qu tm haxanh. em trn hai dung dch th thu c kt ta. X, Y c th l:a) BaCl2, CuSO4 b) MgCl2; Na2CO3 c) Ca(NO3)2, K2CO3 d) Ba(NO3)2, NaAlO2187. Cho 6,48 gam bt kim loi nhm vo 100 ml dung dch hn hp Fe2(SO4)31M v ZnSO4

0,8M. Sau khi kt thc phn ng, thu c hn hp cc kim loi c khi lng m gam. Tr s cam l:a) 16,4 gam b) 15,1 gam c) 14,5 gam d) 12,8 gam

188. in phn dung dch mui nitrat ca kim loi M, dng in cc tr, cng dng in 2A. Sau thi gian in phn 4 gi 1 pht 15 giy, khng thy kh to catot. Khi lng catot tng9,75 gam. S in phn c hiu sut 100%, ion kim loi b kh to thnh kim loi bm ht vocatot. M l kim loi no?

a) Km b) St c) Nhm d) ng189. Gia mui icromat (Cr2O7

2-), c mu da cam, v mui cromat (CrO42-), c mu vng

ti, c s cn bng trong dung dch nc nh sau:


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17

Cr2O72- + H2O 2CrO4

2- + 2H+(mu da cam) (mu vng ti)

Nu ly ng nghim ng dung dch kali icromat (K2Cr2O7), cho t t dung dch xt vong nghim trn th s c hin tng g?

a) Thy mu da cam nht dn do c s pha long ca dung dch xtb) Khng thy c hin tng g l, v khng c xy ra phn ngc) Ha cht trong ng nghim nhiu dn, mu dung dch trong ng nghim khng id) Dung dch chuyn dn sang mu vng ti

190. Cho lung kh CO i qua ng s cha a gam hn hp A gm CuO, Fe2O3v MgO, un nng.Sau mt thi gian, trong ng s cn li b gam hn hp cht rn B. Cho hp th hon ton kh nob hp th trong dung dch Ba(OH)2d ca hn hp kh thot ra khi ng s, thu c x gam ktta. Biu thc ca a theo b, x l:a) a = b - 16x/197 b) a = b + 16x/198 c) a = b 0,09x d) a = b + 0,09x

191. X l mt nguyn t ha hc. X c tng s ht proton, ntron, electron l 115. Trong s htmang in nhiu hn s ht khng mang in l 25 ht. V tr ca X trong bng h thng tunhon l:a) th 35, chu k 4, phn nhm chnh nhm VII (VIIA)b) th 35, chu k 4, phn nhm chnh nhm V (VA)

c) th 30, chu k 4, phn nhm chnh nhm II (IIA)d) th 30, chu k 4, phn nhm ph nhm II (IIB)192. phn bit hai kh CO2v SO2, ngi ta dng:

a) Dung dch nc vi trong, CO2s lm nc vi c cn SO2th khngb) Dng nc brom c) Dng dung dch KMnO4 d) (b), (c)

193. H s ng trc cht b oxi ha bn tc cht phn ngFexOy + CO FemOn + CO2 cn bng s nguyn t cc nguyn t l:a) m b) nx my c) my nx d) mx 2ny

194. So snh s phn ly ion v s dn in gia hai dung dch CH3COOH 0,1M v dung dchCH3COOH 1M.

a) Dung dch CH3COOH 0,1M phn ly ion tt hn v dn in tt hn dung dch CH3COOH 1M.

b) Dung dch CH3COOH 0,1M phn ly ion tt hn dung dch CH3COOH 1M, nhng dn in kmhn dung dch CH3COOH 1M.c) Dung dch CH3COOH 1M phn ly ion kh hn v dn in km hn so vi dung dchCH3COOH 0,1M. V dung dch cht in ly no c nng ln th in ly nh.

d) (a), (c)195. Cho a mol bt km vo dung dch c ha tan b mol Fe(NO3)3. Tm iu kin lin h gia a v b

sau khi kt thc phn ng khng c kim loi.a) b 2a b) b = 2a/3 c) a 2b d) b > 3a

196. Cho 32 gam NaOH vo 200 ml dung dch H3PO41,5M, sau khi phn ng xong, em c cndung dch, tng khi lng cc mui khan c th thu c l:


197. Cho 2,055 gam kim loi X vo lng d dung dch CuCl2, thy c to mt kh thot ra vto 1,47 gam kt ta. X l kim loi g?a) Na b) K c) Ca d) Ba

198. em ngm ming kim loi st vo dung dch H2SO4long. Nu thm vo vi git dungdch CuSO4th s c hin tng g?

a) Lng kh bay ra khng i b) Lng kh bay ra nhiu hnc) Lng kh thot ra t hn

d) Lng kh s ngng thot ra (do kim loi ng bao quanh ming st)199. Sc 9,52 lt SO2(ktc) vo 200 ml dung dch hn hp: NaOH 1M Ba(OH)20,5M KOH0,5M. Kt thc phn ng thu c m gam kt ta. Tr s ca m l:


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18

a) 16,275 gam b) 21,7 gam c) 54,25 gam d) 37,975 gam200. Hn hp A gm cc kh Cl2, HCl v H2. Cho 250 ml hn hp A (tc) vo lng d dungdch KI, c 1,27 gam I2to ra. Phn kh thot ra khi dung dch KI c th tch 80 ml (ktc). Phntrm th tch mi kh trong hn hp A l:

a) 40%; 25%; 35% b) 42,5%; 24,6%; 39,5%c) 44,8%; 23,2%; 32,0% d) 50% ; 28%; 22%

201. em nung 14,52 gam mt mui nitrat ca mt kim loi cho n khi lng khng i, chtrn cn li l mt oxit kim loi, c khi lng gim 9,72 gam so vi mui nitrat. Kim loi trongmui nitrat trn l:

a) Cu b) Zn c) Ag d) Fe

202. Dn 1,568 lt hn hp A (ktc) gm hai kh H2v CO2qua dung dch c ha tan 0,03 molBa(OH)2, thu c 3,94 gam kt ta. Phn trm th tch mi kh trong hn hp A l:

a) 71,43%; 28,57% b) 42,86%; 57,14%c) (a), (b) d) 30,72%; 69,28%

203. Phn ng no khng phi l phn ng oxi ha kh?a) 2NO2 + 2NaOH NaNO2 + NaNO3 + H2Ob) Al4C3 + 12H2O 3CH4 + 4Al(OH)3

c) 3Fe(OH)2 + 10HNO3 3Fe(NO3)3 + NO + 8H2Od) KNO3 KNO2 + 1/2O2204. Sp theo th t pH tng dn cc dung dch mui c cng nng mol/l:

(I): KCl; (II): FeCl2; (III): FeCl3; (IV): K2CO3a) (III) < (II) < (I) < (IV) b) (I) < (II) < (III) < (IV)c) (IV) < (III) < (II) < (I) d) (II) < (III) < (I) < (IV)

205. Nhit mt kh tng t 0C n 10C p sut khng i, th th tch ca kh s thay inh th no so vi th tch lc u?

a) tng khong 1/273 b) tng khong 10/273c) gim khong 1/273 d) gim khong 10/273

206. Cho bit s th t nguyn t Z (s hiu nguyn t) ca cc nguyn t: S, Cl, Ar, K, Ca ln

lt l: 16, 17, 18, 19, 20. Xem cc ion v nguyn t sau: (I): S2-

; (II): Cl-

; (III): Ar; (IV): K+

;(V): Ca2+. Th t bn knh tng dn cc ion, nguyn t trn nh l:a) (I) < (II) < (III) < (IV) < (V)b) (V) < (IV) < (III) < (II) < (I)c) (V) < (IV) < (III)


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loi). em ha tan ht lng cht rn B bng dung dch H2SO4m c, nng, c 11,76 lt khduy nht SO2(ktc) thot ra. Khi lng mi kim loi c trong 19,3 gam hn hp A l:a) 5,4 gam Al; 13,9gam Fe b) 4,05 gam Al; 15,25 gam Fec) 8,1 gam Al; 11,2 gam Fe d) 8,64 gam Al; 10,66 gam Fe211. X l mt nguyn t ha hc. Ion X2+c tng s cc ht proton, ntron, electron l 80 ht.Trong s ht khng mang in nhiu hn s ht mang in tch m l 6 ht. Cu hnh electronca ion X2+l:

a) 1s22s22p63s23p6 b) 1s22s22p63s23p64s23d6c) 1s22s22p63s23d5 d) 1s22s22p63s23p63d6

212. Cho hn hp dng bt hai kim loi Mg v Al vo dung dch c ha tan hai mui AgNO3vCu(NO3)2. Sau khi phn ng kt thc, thu c hn hp hai kim loi v dung dch D. Nh vy:

a) Hai mui AgNO3v Cu(NO3)2 phn ng ht v hai kim loi Mg, Al cng phn ng ht.b) Hai kim loi Mg, Al phn ng ht, Cu(NO3)2c phn ng, tng qut cn d Cu(NO3)2

c) Hai kim loi Mg, Al phn ng ht, tng qut c AgNO3, Cu(NO3)2dd) Mt trong hai kim loi phi l Ag, kim loi cn li l Cu hoc Al

213. Nhng mt mt ming kim loi M lng d vo 200 ml dung dch CuSO41,5M. Sau khiphn ng kt thc, kim loi Cu to ra bm ht vo ming kim loi M. em cn li thy khilng dung dch gim 13,8 gam so vi trc khi phn ng. M l kim loi no?

a) Al b) Fe c) Mg d) Zn214. Nhng mt ming giy qu vo mt dung dch, thy ming giy qu khng i mu. Nhvy dung dch (hay cht lng) l:

a) Mt axit hay dung dch mui c to bi baz yu, axit mnh (nh NH4Cl)b) Nc nguyn cht hay dung dch trung tnh (nh dung dch NaCl)c) Mt dung dch c pH thpd) Khng phi l mt dung dch c tnh baz

215. Cho lung kh CO i qua ng s ng m gam mt oxit st Fe xOy, un nng, thu c 57,6gam hn hp cht rn gm Fe v cc oxit. Cho hp th kh thot ra khi ng s vo dung dchnc vi trong d th thu c 40 gam kt ta. Tr s ca m l:

a) 80 gam b) 69,6 gam c) 64 gam d) 56 gam

216. Nu em ha tan ht 57,6 gam hn hp cht rn trong ng s cu (215) trn bng dungdch HNO3long, sau khi c cn dung dch th thu c 193,6 gam mt mui khan. FexOy cu(214) l:

a) FeO b) Fe2O3 c) Fe3O4 d) FeO4

217. Nguyn t ng v phng x C14

6 c chu k bn r l = 5 580 nm, ng thi phng thchht

C14

6 XA

Z + e0

1 Tr s Z v A ca nguyn t X trong phn ng ht nhn trn l:a) Z = 6; A = 14 b) Z = 5; A = 14 c) Z = 7; A = 10 d) Z = 7; A = 14

218. Xt phn ng: H2S + CuCl2 CuS + 2HCl

a) Phn ng trn khng th xy ra c v H2S l mt axit yu, cn CuCl2l mui ca axit mnh(HCl)b) Tuy CuS l cht t tan nhng n mui ca axit yu (H 2S) nn khng th hin din trong mi

trng axit mnh HCl, do phn ng trn khng xy rac) Phn ng trn xy ra c l do c to cht CuS rt t tan, vi dung dch HCl c nng thp

khng ha tan c CuSd) (a), (b)

219. Cho 200 ml dung dch hn hp Na2CO30,6M v K2SO40,4M tc dng va vi 100 ml dungdch hn hp Pb(NO3)2 0,9M v BaCl2 nng C (mol/l). Thu c m gam kt ta. Tr s ca Cl:


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a) 1,1 M b) 1M c) 0,9M d) 0,8M220. Tr s m cu (219) l:a) 46,23 gam b) 48,58 gam c) 50,36 gam d) 53,42 gam

221. Hp cht hay ion no u c tnh axit?a) HSO4

-; HCO3-; HS- b) CH3COO

-; NO3-; C6H5NH3

+

c) SO42-; Al3+; CH3NH3

+ d) HSO4-; NH4

+; Fe3+222. Cho 250 ml dung dch A c ha tan hai mui MgSO4v Al2(SO4)3tc dng vi dung dch

xt d, lc ly kt em nung n khi lng khng i, thu c 8 gam cht rn. Cng 250 mldung dch trn nu cho tc dng vi dung dch amoniac d, lc ly kt ta, em nung nhit cao cho n khi lng khng i th thu c 23,3 gam cht rn. Cc phn ng xy ra honton. Nng mol/l mi mui trong dung dch A l:a) MgSO40,8M; Al2(SO4)30,8M b) MgSO40,8M; Al2(SO4)31Mc) MgSO40,8M; Al2(SO4)30,6M d) MgSO40,6M; Al2(SO4)30,8M223. Ha tan ht 21,6 gam hn hp hai kim loi Mg v Fe trong dung dch HCl, c V lt H2(ktc)thot ra. Tr s V di y khng th c?a) 8 lt b) 21 lt c) 24 lt d) c (a), (b) v (c)224. Mt trn ma axit c pH = 3,3. S ion H+c trong 100 ml nc ma ny bng bao nhiu?a) 3.1019 b) 5.10-5 c) 1,2.1018 d) 3,018.1020

225. Cho 5,34 gam AlCl3vo 100 ml dung dch NaOH c nng C (mol/lt), thu c 2,34gam kt ta trng. Tr s ca C l:a) 0,9M b) 1,3M c) 0,9M v 1,2M d) (a), (b)

226. Axit clohiric c th tham gia phn ng:a. trao i, nh to mi trng axit hay to mui clorua khng tan (nh AgCl); HCl cng c th

ng vai tr cht kh trong phn ng oxi ha kh (nh to kh Cl2)b. ng vai tr mt cht oxi hac. ch c th ng vai tr mt cht trao i, cng nh vai tr mt axit thng thngd. (a), (b)

227. Ha tan ht 2,96 gam hn hp hai kim loi, thuc phn nhm chnh nhm II hai chu klin tip, trong dung dch HCl, thu c 1,12 lt kh hiro (ktc). Hai kim loi trn l:

a) Be, Mg b) Mg, Ca c) Ca, Sr d) Sr, Ba228. S nh hp kh mu nu NO2to kh N2O4khng mu l mt phn ng ta nhit v cnbng.

2NO2 N2O4Cho kh NO2vo mt ng nghim y np kn 30C. i mt thi gian kh trong ng t cnbng. Sau , em ngm ng nghim ny trong chu nuc 0C, th s c hin tng g k tlc em ngm nc ?

a) Mu nu trong ng nghim khng ib) Mu nu trong ng nghim nht dn

c) Khi tng nhit cn bng dch chuyn theo chiu thu nhit, nn mu nu trong ng ng khngi.

d) (a), (c)229. Phn ng iu ch amoniac t nit v hiro l mt phn ng thun nghch v ta nhitN2 + 3H2 2NH3 thu c nhiu NH3th:

a) Thc hin nhit cao, p sut cao, tng nng N2, H2b) Thc hin p sut cao, lm tng nng N2, H2c) Thc hin p sut thp khi b bnh phn ng, nhng thc hin nhit cao, lm tng

nng tc cht N2, H2d) Thc hin nhit thp, p sut thp, nhng cn dng cht xc tc lm nng cao hiu sut

thu c nhiu NH3t N2v H2


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230. Cu hnh in t ca mt nguyn t X nh sau: 1s22s22p63s23p64s23d10. Chn pht biu ng:a. X l mt kim loi, n c tnh kh b. X chu k 4, X thuc phn nhm ph (ct

B)c. (a), (b) d. X th 30, chu k 4, X thuc phn nhm chnh (ct A), X l mt phi

kim231. Hn hp A gm hai kim loi Al, Ba. Cho lng nc d vo 4,225 gam hn hp A, khuy u

phn ng xy ra hon ton, c kh thot, phn cht rn cn li khng b ha tan ht l 0,405gam. Khi lng mi kim loi trong 4,225 gam hn hp A l:

a) 1,485 g; 2,74 g b) 1,62 g; 2,605 g c) 2,16 g; 2,065 g d) 2,192 g; 2,033g232. Xem phn ng:

CH3CH2OH + K2Cr2O7 + H2SO4 CH3COOH + Cr2(SO4)3 + K2SO4+ H2OCc h s nguyn nh nht ln lt ng trc cc tc cht: cht oxi ha, cht kh v cht tomi trng axit ca phn ng trn phn ng cn bng s nguyn t cc nguyn t l:

a) 3; 2; 8 b) 2; 3; 8 c) 6; 4; 8 d) 2; 3; 6233. Ha tan ht mt lng oxit st FexOybng dung dch H2SO4m c, nng. C kh mi xc

thot ra v cn li phn dung dch D. Cho lng kh thot ra trn hp th ht vo lng nc vid th thu c 2,4 gam kt ta. em c cn dung dch D th thu c 24 gam mui khan. Cngthc ca FexOyl:

a) Fe2O3 b) FeO c) Fe3O4d) FexOych c th l FeO hoc Fe3O4nhng s liu cho khng chnh xc234. Hn hp A gm hai kim loi u c ha tr II. em 3,46 gam hn hp A ha tan ht trong dung

dch HCl, thu c 1,12 lt kh hiro (ktc). Hai kim loi trong hn hp A c th l:a) Ca; Zn b) Fe; Cr c) Zn; Ni d) Mg; Ba

235. Hn hp A gm ba oxit st (FeO, Fe3O4, Fe2O3) c s mol bng nhau. Ha tan ht m gam hnhp A ny bng dung dch HNO3th thu c hn hp K gm hai kh NO2v NO c th tch1,12 lt (ktc) v t khi hn hp K so vi hiro bng 19,8. Tr s ca m l:a) 20,88 gam b) 46,4 gam c) 23,2 gam d) 16,24 gam

236. Cho mt lng bt kim loi nhm trong mt cc thy tinh, cho tip dung dch HNO3long vocc, khuy u cho phn ng hon ton, c cc kh NO, N2O v N2thot ra. By gi cho tip

dung dch xt vo cc, khuy u, c hn hp kh thot ra (khng k hi nc, khng kh). Hnhp kh ny c th l kh no?a) NO2; NH3 b) NH3; H2 c) CO2; NH3 d) H2; N2237. in phn dung dch KI, dng in cc than ch, c cho vi git thuc th phenolptaleinvo dung dch trc khi in phn. Khi tin hnh in phn th thy mt bn in cc c muvng, mt bn in cc c mu hng tm.

a. Vng in cc c mu vng l catot, vng c mu tm l anot bnh in phnb. Vng in cc c mu vng l anot, vng c mu tm l catot bnh in phn

c. Mu vng l do mui I-khng mu b kh to I2tan trong nc to mu vng, cn mu tm ldo thuc th phenolptalein trong mi trng kim (KOH)

d. (a), (c)

238. in phn dung dch CuSO4vi in cc bng ng, trong sut qu trnh in phn thymu xanh lam ca dung dch khng i. iu ny chng t:a. S in phn trn thc cht l in phn nc ca dung dch nn mu dung dch khng ib. S in phn thc t khng xy ra, c th do mt ngun inc. Lng ion Cu2+b oxi ha to Cu bm vo catot bng vi lng Cu ca anot b khd. Ion Cu2+ca dung dch b in phn mt bng vi lng ion Cu2+ do anot tan to ra

239. T dung dch HCl 40%, c khi lng ring 1,198 g/ml, mun pha thnh dung dch HCl 2M thphi pha long bao nhiu ln?a) 6,56 ln b) 21,8 ln c) 10 ln d) 12,45 ln


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240. Vi cc ha cht v phng tin c sn, gm dung dch H2SO492% (c khi lng ring 1,824gam/cm3), nc ct, cc dng c o th tch, hy cho bit cch pha thu c dung dch H2SO41M.a. Ly 15,5 phn th tch nc vo 1 phn th tch dung dch H2SO492%

b. Ly 1 phn th tch dung dch H2SO492% cho vo cc c sn nc ct, sau tip tc thmnc ct vo cho n va 17,1 phn th tch dung dch

c. Ly 1cm3dung dch H2SO492% cho vo cc cha sn mt lng nc ct khng nhiu lm,tip tc thm nc ct vo cho n 16,5 cm3dung dch

d. Tt c u khng ng241. Xem cc axit: (I): H2SiO3; (II): H3PO4; (III): H2SO4; (IV): HClO4

Cho bit Si, P, S, Cl l cc nguyn t cng chu k 3, tr s Z ca bn nguyn t trn ln lt l:14, 15, 16, 17. mnh tnh axit gim dn nh sau:a) (III) > (II) > (IV) > (I) b) (III) > (IV) > (II) > (I) c) (III) > (II) > (I) > (IV) d) (IV) >(III) > (II) > (I)

242. X, Y, Z l ba nguyn t ha hc c cu hnh electron lp ha tr ln lt l: 2s22p3; 3s23p3;4s24p3.

a. Tnh kim loi gim dn: X > Y > Z b. Tnh oxi ha tng dn: X < Y < Zc. Tnh phi kim gim dn: X > Y > Z d. Bn knh nguyn t gim dn: X > Y > Z

243. Ngi ta nhn thy ni cc mi hn kim loi d b r (g, mau h) hn so vi kim loikhng hn, nguyn nhn chnh l:a. Do kim loi lm mi hn khng chc bng kim loi c hn

b. Do kim loi ni mi hn d b n mn ha hc hnc. Do ni mi hn thng l hai kim loi khc nhau nn c s n mn in ha hcd. Tt c cc nguyn nhn trn244. Coi phn ng: 2NO(k) + O2(k) 2NO2(k) l phn ng n gin (phn ng mt giai

on). Nu lm gim bnh cha hn hp kh trn mt na (tc l tng nng mol/l cc chttrong phn ng trn hai ln) th vn tc phn ng trn s nh th no?

a) Vn tc phn ng tng hai ln b) Vn tc phn ng tng 8 lnc) Vn tc phn ng khng thay i d) Vn tc phn ng s gim v vn tc phn nghch

tng nhanh hn245. Xem phn ng cn bng sau y l phn ng n gin:2SO2(k) + O2(k) 2SO3(k)

Phn ng trn ang trng thi cn bng trong mt bnh cha nhit xc nh. Nu lm gimth tch bnh cha mt na, tc lm tng nng mol/lt cc cht trong phn ng trn gp i th:

a) Vn tc phn ng tng 8 ln b) Vn tc phn ng nghch tng 4 lnc) Vn tc phn ng thun tng 8 ln d) Do vn tc phn ng thun tng nhanh hn phn

ng nghch, nn phn ng s trn s dch chuyn theo chiu thun246. Ha tan hn hp qung Xierit (cha FeCO3) v Pyrit (cha FeS2) bng dung dch axitnitric, thu c hn hp hai kh c t khi so vi Nit bng 80/49. Hai kh l:a) CO2; NO2 b) CO2; NO c) CO2; SO2 d) SO2; N2O

247. Khi lng tinh th CuSO4.5H2O cn thm vo 250 gam dung dch CuSO45% nhm thu cdung dch CuSO48% l:a) 10 gam b) 12,27 gam c) 13,39 gam d) 14,36 gam

248. X l mt trong su mui: AgNO3, Cu(NO3)2, MgCO3, Ba(HCO3)2, NH4HCO3, NH4Cl. em nungX cho n khi lng khng i th thu c cht rn Y, cht rn Y ny ha tan c trong ncto dung dch Z. X l mui no?

a) NH4HCO3 b) MgCO3 c) NH4Cl d) Ba(HCO3)2249. tan ca mui n (NaCl) trong nc 80C l 38,1 gam (ngha l 80C, 100 gam ncha tan c ti a 38,1 gam NaCl). Khi lm ngui 150 gam dung dch NaCl bo ha 80C v20C th c m gam mui kt ta, v thu c dung dch c nng 26,4%. Chn kt lun ng:


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a) S ha tan NaCl trong nc l mt qu trnh ta nhitb) Dung dch bo ha NaCl 80C c nng l 27,59%

c) m = 2,42 gam d) (b), (c)250. Ion A-c 18 in t. in t m nguyn t A nhn vo phn lp, lp in t no caA?

a) phn lp s, lp th t b) phn lp p, lp th bac) phn lp p, lp th t d) phn lp d, lp th ba251. Mt cc nc c cha: a mol Ca2+, b mol Mg2+, c mol HCO

3

-, d mol Cl-, e mol SO4

2-. Chn phtbiu ng:

a) y l nc cng tm thi b) y l nc cng vnh cuc) y l nc cng ton phn, nhng ion Ca 2+v SO4

2-khng th hin din trong cng mt dungdch c, v n s kt hp to kt ta CaSO4tch khi dung dchd) c = 2(a +b) (d + 2e)

252. Mt dung dch c cha cc ion: x mol M3+; 0,2 mol Mg2+; 0,3 mol Cu2+; 0,6 mol SO42-; 0,4

mol NO3-. C cn dung dch ny thu c 116,8 gam hn hp cc mui khan. M l:

a) Cr b) Fe c) Al d) Mt kim loi khc

253. Xt phn ng: FeS2 + H2SO4(, nng) Fe2(SO4)3 + SO2 + H2O

H s nguyn nh nht ng trc cht oxi ha, cht kh pha tc cht phn ng trn cn bngs nguyn t cc nguyn t l:a) 1; 7 b) 14; 2 c) 11; 2 d) 18; 2

254. Cho dung dch HNO3long vo mt cc thy tinh c ng 5,6 gam Fe v 9,6 gam Cu. Khuyu phn ng xy ra hon ton, c 3,136 lt kh NO thot ra (ktc), cn li m gam cht khngtan. Tr s ca m l:

a) 7,04 gam b) 1,92 gam c) 2,56 gam d) 3,2 gam255. Xt cc dung dch sau y u c nng 0,1 mol/l: NaCl; HCl; NaOH; Ba(OH)2; NH4Cl;

Na2CO3. Tr s pH tng dn ca cc dung dch trn l:a) HCl < NaCl < NH4Cl < Na2CO3< NaOH < Ba(OH)2b) HCl < NaCl < Na2CO3< NH4Cl < NaOH < Ba(OH)2

c) HCl < Na2CO3< NH4Cl < NaCl < NaOH < Ba(OH)2d) HCl < NH4Cl < NaCl < Na2CO3< NaOH < Ba(OH)2256. Hm lng st trong loi qung st no cao nht? (Ch xt thnh phn chnh, b qua tp cht)

a) Hematit b) Pyrit c) Manhetit d) Xierit257. Dung dch D c to ra do ha tan kh NO2vo dung dch xt c d. Cho bt kim loinhm vo dung dch D, c 4,48 lt hn hp K gm hai kh (ktc) thot ra, trong c mt kh cmi khai c trng. T khi ca K so vi heli bng 2,375. Phn trm th tch mi kh trong hnhp K l:

a) 50%; 50% b) 40%; 60% c) 30%; 70% d) 35%; 65%258. Hn hp A gm mu vi (cha 80% khi lng CaCO3) v mu qung Xierit (cha 65%

khi lng FeCO3). Phn cn li trong vi v qung l cc tp cht tr. Ly 250 ml dung dch

HCl 2,8M cho tc dng vi 38,2 gam hn hp A. Phn ng xy ra hon ton. Kt lun no diy ph hp?a) Khng HCl phn ng ht cc mui Cacbonatb) Cc mui Cacbonat phn ng ht, do c HCl dc) Phn ng xy ra va d) Khng d kin kt lun

259. C 6 dung dch khng mu, ng trong cc cc khng c nhn: AlCl3; NH4NO3; KNO3; ZnCl2;(NH4)2SO4; K2SO4. Dng c ha cht no di y nhn bit cc dung dch ny?a) NaOH b) NH3 c) Ba d) Pb(NO3)2


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260. Cho m gam mt kim loi vo cc nc, thy c si bt kh v thu c dung dch. Cn licc dung dch thy khi lng tng thm 38m/39 gam. Kim loi cho vo cc nc l:a) Li b) Na c) Ba d) Mt kim loi khc261. Metylamin l mt cht kh c mi khai ging amoniac, metylamin ha tan trong nc v c

phn ng mt phn vi nc theo phn ng:CH3NH2 + H2O CH3NH3

+ + OH-Nc trong phn ng trn ng vai tr cht g?a) Axit b) Baz c) Cht b oxi ha d) Cht b kh

262. mt ha cht c th lm phn bn th cn iu kin g?a) Cha cc nguyn t ha hc cn thit cho s dinh dng v tng trng ca cy

b) Cha cc nguyn t ha hc cn thit cho s dinh dng, tng trng ca cy v ha cht phi tha tan trong nc khng b hao ht do nc ma cun tri

c) Ha cht phi ha tan c trong ncd) (a), (c)

263. Khi ngi th hn hot ng cng nh khi ct kim loi bng m hn (dng nhit cao cam hn in kim loi nng chy v t ra), ngoi cc ht kim loi chi sng bn ra cn c mikht rt kh chu. Mi kht ny ch yu l mi ca cht no?

a) Mi ca oxit kim loi b) Mi ca ozon to ra t oxi nhit cao

c) Mi ca cc tp cht trong kim loi chy to ra (nh do tp cht S chy to SO2)d) Mi ca hi kim loi bc hi nhit cao264. Mt oxit st c khi lng 25,52 gam. ha tan ht lng oxit st ny cn dng va 220 ml dung dch H2SO42M (long). Cng thc ca oxit st ny l:a) FeO b) Fe2O3 c) Fe3O4 d) FeO4265. 38,9C; 28,4C; 38,9C; 63,7C l nhit nng chy ca cc kim loi c nhit nngchy thp nht: Cs; Rb; Hg; K. Nhit nng chy ca thy ngn (Hg) l:a) 63,7C b) 38,9C c) 28,4C d) 38,9C266. in phn Al2O3nng chy trong thi gian 2 gi 40 pht 50 giy, cng dng in 5A (Ampre), thu c 3,6 gam nhm kim loi catot. Hiu sut ca qu trnh in phn ny l:a) 80% b) 90% c) 100% d) 70%

267. Trong cc cht v ion: CH3COO-

; NH3; NO3-

; CO32-

; OH-

; Cl-

; SO42-

; AlO2-

; C6H5NH3+

;C6H5O-(phenolat); ClO4

-; K+; Fe3+; C2H5O-(etylat); S2-; C6H5NH2(anilin) th cc cht c coi l

baz l:a) NH3; OH

-; C6H5NH2b) CH3COO-; NH3; CO3

2-; OH-; AlO2-; C6H5O

-; C2H5O-; S2-; C6H5NH2

c) CH3COO-; CO3

2-; AlO2-; C6H5O

-; ClO4-; C2H5O

-; S2- d) (a) v (c)268. Sc 1,792 lt kh SO2(ktc) vo 250 ml dung dch Ba(OH)2nng C (mol/l). Phn ngxy ra hon ton, thu c 8,68 gam kt ta. Tr s ca C l:a) 0,16M b) 0,16M v 0,2M c) 0,24M d) (a), (c)

269. H2S c cha S c s oxi ha cc tiu, bng -2. Chn pht biu ng:a) H2S ch c th ng vai tr cht kh hoc tham gia nh cht trao i, ch khng th ng vai

tr cht oxi ha

b) Trong phn ng oxi ha, H2S thng b oxi ha to lu hunh n cht c s oxi ho bng 0 hayhp cht SO2trong S c s oxi ha bng +4. H2S khng bao gi b khc) Khi tham gia phn ng oxi ha kh, H2S c th ng vai tr cht oxi had) (a), (b)

270. Thc hin phn ng nhit nhm gia 6,48 gam Al vi 17,6 gam Fe2O3. Ch c phn ng nhmkh oxit kim loi to kim loi. em ha tan cht rn sau phn ng nhit nhm bng dung dchxt d cho n kt thc phn ng, thu c 1,344 lt H2(ktc). Hiu sut phn ng nhit nhml:a) 100% b) 90,9% c) 83,3% d) 70%


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271. Hn hp A dng bt gm Fe2O3v Al2O3. Cho kh H2d tc dng hon ton vi 14,12 gam hnhp A nung nng, thu c hn hp cht rn B. Ha tan ht hn hp B bng dung dch HCl ththy thot ra 2,24 lt khi hiro iu kin tiu chun. Phn trm khi lng mi cht trong hnhp A l:

a) 56,66% Fe2O3; 43,34% Al2O3 b) 52,48% Fe2O3; 47,52% Al2O3c) 40% Fe2O3; 60% Al2O3 d) 60% Fe2O3; 40% Al2O3

272. Trong cc dung dch sau y: KCl; KHCO3; KHSO4; KOH; KNO3; CH3COOK; C6H5OK (kaliphenolat); K

2SO

4; KI; K

2S; KBr; KF; CH

3CH

2OK; KAlO

2; KClO

4, dung dch no c pH > 7?

a) KOH; CH3COOK; C6H5OK; K2S; CH3CH2OK; KAlO2b) KOH; KCl; KNO3; K2SO4; KI; KBr; KF; KClO4c) KOH; KHCO3; CH3COOK; C6H5OK; K2S; CH3CH2OK; KAlO2; KClO4d) KOH; KHCO3; CH3COOK; C6H5OK; K2S; KF; CH3CH2OK; KAlO2

273. Trong cc dung dch sau y: HCl; NaCl; NH4Cl; FeCl2; C6H5NH3Cl (phenylamoni clorua);BaCl2; CH3NH3Cl; AlCl3; KCl; FeCl3; MgCl2; (CH3)2NH2Cl; CaCl2; NaHSO4; NaHS; ZnCl2;LiCl; CuCl2; NiCl2, dung dch no c pH < 7?a) HCl; NaCl; BaCl2; KCl; MgCl2; CaCl2; NaHSO4; NaHS; LiCl

b) HCl; NH4Cl; FeCl2; C6H5NH3Cl; CH3NH3Cl; AlCl3; FeCl3; (CH3)2NH2Cl; NaHSO4; ZnCl2;CuCl2; NiCl2

c) HCl, NH4Cl; FeCl2; C6H5NH3Cl; CH3NH3Cl; AlCl3; FeCl3; MgCl2; (CH3)2NH2Cl; NaHSO4;ZnCl2; CuCl2; NiCl2d) HCl; NH4Cl; FeCl2; C6H5NH3Cl; CH3NH3Cl; AlCl3; FeCl3; (CH3)2NH2Cl; NaHSO4; NaHS;

ZnCl2; CuCl2; NiCl2274. Ha tan ht m gam bt kim loi nhm trong dung dch HNO3, thu c 13,44 lt (ktc) hnhp ba kh NO, N2O v N2. T l th tch VNO: VN2O: VN2= 3:2:1. Tr s ca m l:a) 32,4 gam b) 31,5 gam c) 40,5 gam d) 24,3 gam

275. H s ng trc FeCl2; FeCl3 phn ngFexOy + HCl FeCl2 + FeCl3 + H2Ocn bng s nguyn t cc nguyn t l:

a) (y-x); (3x-2y) b) (2x-3y); (2x-2y) c) (3x-y); (2y-2x) d) (3x-2y);

(2y-2x)276. in phn dung dch AgNO3, dng in cc bng bc. Cng dng in 5 A, thi gianin phn 1 gi 4 pht 20 giy.a) Khi lng catot tng do c kim loi bc to ra bm vob) Khi lng anot gim 21,6 gam

c) C 1,12 lt kh O2(ktc) thot ra anot v dung dch sau in phn c cha 0,2 mol HNO3d) (a), (c)

277. Trn dung dch axit oxalic vi dung dch canxi clorua, c hin tng g xy ra?a) Thy dung dch c, do c to cht khng tan

b) Dung dch trong sut, khng c phn ng xy ra, v axit hu c yu (HOOC-COOH) khng tcdng c vi mui ca axit mnh (HCl)

c) Lc u dung dch trong, do khng c phn ng, nhng khi un nng thy dung dch c l dophn ng xy ra c nhit caod) Khi mi vo th dung dch c do c to cht khng tan canxi oxalat, nhng mt lc sau thy

kt ta b ha tan, dung dch tr li trong l do axit mnh HCl va to ra phn ng ngc tr li278. Ha tan ht hn hp A gm x mol Fe v y mol Ag bng dung dch hn hp HNO3 vH2SO4, c 0,062 mol kh NO v 0,047 mol SO2thot ra. em c cn dung dch sau phn ng ththu c 22,164 gam hn hp cc mui khan. Tr s ca x v y l:a) x = 0,08; y = 0,03 b) x = 0,07; y = 0,02c) x = 0,09; y = 0,01 d) x = 0,12; y = 0,02


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279. Th t tr s pH gim dn ca cc dung dch sau y c cng nng mol/lt: KCl; NH4Cl;KOH; HCl; K2CO3; Ba(OH)2; H2SO4l:a) Ba(OH)2> KOH > KCl > K2CO3> NH4Cl > HCl > H2SO4b) .Ba(OH)2> KOH > K2CO3> KCl > NH4Cl > HCl > H2SO4c) Ba(OH)2> KOH > K2CO3> NH4Cl > KCl > HCl > H2SO4d) H2SO4> HCl > NH4Cl > KCl > K2CO3> KOH > Ba(OH)2280. Nhng mt ming kim loi M vo 100 ml dung dch CuCl21,2M. Kim loi ng to ra bmht vo ming kim loi M. Sau khi kt thc phn ng, khi lng ming kim loi tng 0,96 gam.M l kim loi no?a) Al b) Fe c) Mg d) Ni

281. Khi lng ring ca kim loi Canxi l 1,55 gam/ml. Th tch ca 1 mol Ca bng bao nhiu?a) 25,806 ml b) 34,720 ml b) 22,4 lt d) 25,806 lt

282. Thy ngn (Hg) l kim loi duy nht hin din dng lng iu kin thng. Hi thy ngn rtc. Thy ngn c khi lng phn t l 200,59, c khi lng ring bng 13,55 gam/ml. T khica thy ngn v t khi hi ca thy ngn c tr s l:a) u bng 6,9 b) u bng 13,55 c) 13,55 v 6,9 d) Tt c u sai283. Khi lng ring ca kh ozon 27,3C; 106,4 cmHg bng bao nhiu?

a) 1,818 g/ml b) 2,727 g/ml c) 3,562 g/l d) 2,727g/l

284. Phn ng no sau y khng xy ra?a) FeS2 + 2HCl FeCl2 + S + H2Sb) FeS2 + 18HNO3 Fe(NO3)3 + 2H2SO4 + 15NO2 + 7H2Oc) 2FeI2 + I2 2FeI3d) 2FeCl2 + Cl2 2FeCl3

285. Th tch dung dch H2SO498% c khi lng ring 1,84 g/ml cn ly pha thnh 350 mldung dch H2SO437% c khi ring 1,28 g/ml l:a) 91,9 ml b) 85,3 ml c) 112,5 ml d) Mt tr s khc286. Cho 28 gam Fe ha tan trong 256 ml dung dch H2SO4 14% (c khi lng ring1,095g/ml), c kh hiro thot ra. Sau khi kt thc phn ng, em c cn dung dch th thu cm gam mt tinh th mui ngm 7 phn t nc (nmui: nnc= 1 : 7). Tr s ca m l:

a) 139 gam b) 70,13 gam c) 116,8 gam d) 111,2 gam287. Nhng mt ming kim loi M vo dung dch CuSO4, sau mt lc em cn li, thy ming loi ckhi lng ln hn so vi trc khi phn ng. Cho bit kim loi b y ra khi mui bm ht voming kim loi cn d. M khng th l:a) Fe b) Zn c) Ni d) Al

288. Dung dch A l dung dch HNO3. Dung dch B l dung dch NaOH. Cho bit 10 ml dung dch Atc dng vi 12 ml dung dch B, thu c dung dch ch gm NaNO3v H2O. Nu trn 15,5 mldung dch A vi 17 ml dung dch B, thu c dung dch D. Cc cht c trong dung dch D l:a) NaNO3; H2O b) NaNO3; NaOH; H2O c) NaNO3; HNO3; H2O d) C thgm NaNO3; H2O; c HNO3ln NaOH v mui b thy phn (c phn ng ngc li)289. Xem cc dung dch: KHSO4, KHCO3, KHS. Chn cch gii thch ng vi thc nghim:

a. Mui KHSO4 l mui c to bi axit mnh (H2SO4) v baz mnh (KOH) nn mui nykhng b thy phn, do dung dch mui ny trung tnh, pH dung dch bng 7b. Cc mui KHCO3, KHS trong dung dch phn ly hon to ion K

+, HCO-cng nh K+, HS-. K+xut pht t baz mnh (KOH) nn l cht trung tnh. Cn HCO3

-, HS-l cc cht lng tnh (vchng cho c H+ln nhn c H+, nn va l axit va l baz theo nh ngha ca Bronsted).Do cc dung dch loi ny (KHCO3, KHS) trung tnh, pH dung dch bng 7

c. (a), (b) d. Tt c u sai v tri vi thc nghim290. Kh nit ioxit (NO2) l mt kh mu nu, c mi hc, rt c, n c coi l oxit axit cahai axit, HNO3(axit nitric) v HNO2(axit nitr). Kh NO2tc dng vi dung dch kim to hai


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mui (nitrat, nitrit) v nc. Cho 2,24 lt NO2(ktc) tc dng hon ton vi 100 ml dung dchKOH 1M, thu c dung dch D. Chn kt lun ng v pH dung dch D:a) pH = 7, v c phn ng va b) pH < 7 v c NO2d, n phn ng tip vi H2O toHNO3c) pH > 7 v c KOH d d) pH > 7291. S oxi ha ca S trong cc cht v ion: K2S, FeS2, S, S8, Na2S2O3, S4O6

2-, SO2, SO42-ln

lt l:a. -2; -1; 0; 0; +2; +2,5; +4; +6 b. -2; -2; 0; 0; +4; +5; +4; +6

c. -2; -2; 0; 0; +2; +3; +4; +6 d. -2; -1; 0; 0; +2; +3; +4; +8292. Cho mt thanh kim loi M vo dung dch Cu(NO3)2. Sau khi ly thanh kim loi ra khidung dch (c kim loi Cu bm vo). Cn li dung dch thy khi lng dung dch tng so vitrc khi phn ng. M khng th l:a) Pb b) Fe c) Zn d) (a), (c)

293. X l mt nguyn t ha hc. Ion X2+c s khi bng 55, s ht khng mang in tch ca ionny nhiu hn s ht mang in tch m l 7 ht. Chn ng:

a. Cu hnh electron ca ion ny l: 1s22s23s23p63d5 b. S hiu (S th t) nguyn t ca X2+lZ = 23

c. X l mt phi kim d. Tt c u sai

294. Phn ng no khng xy ra?a) CuO + H2 Cu + H2Ob) MgO + H2 Mg + H2Oc) 3MnO2 + 4Al 3Mn + 2Al2O3d) Cu + 2Fe(NO3)3 Cu(NO3)2 + 2Fe(NO3)2

295. X l mt nguyn t ha hc. Axit c cha X l HnXO3(n l s nguyn t nhin). Phn trmkhi lng ca X trong mui Kali ca axit ny l 18,182%. X l nguyn t no?a) C b) Sc) Si d) Mt nguyn t khc

296. Trn 120 ml dung dch HCl 5,4% (c khi lng ring 1,025 g/ml) vi 100 ml dung dch NaOH6,47% (c khi lng ring 1,07 g/ml), thu c 220 ml dung dch D. Tr s pH ca dung dch Dl:a) 1,39 b) 2,05 c) 8,12 d) 7297. Mt hp cht c mu xanh lc to ra khi t Crom kim loi trong Oxi. Phn trm khilng ca Crom trong hp cht ny l 68,421% . Cng thc ca hp cht ny l:a) CrO b) Cr2O3 c) CrO3 d) CrO2

298. LD50c ngha l liu thuc gii hn khin mt na (50%) s con vt th nghim b cht. LiuLD50 etanol qua ng ming (ung) ca chut l 0,013ml/g (s ml etanol trn th trng tnhbng gam ca chut) . Gi s khng c s khc bit LD50v etanol gia chut v ngi, th LD50ca mt ngi cn nng 60kg bng bao nhiu?a) 0,78 ml b) 780 gam c) 78 ml d) 0,78 lt

299. Cht khong olomit (dolomite) gm CaCO3.MgCO3. Tuy nhin trong mt s trng hp, t ls mol gia CaCO3vi MgCO3khc 1 : 1. C mt mu olomit coi l hn hp gm CaCO3vMgCO3. em nung 20,008 gam mt mu olomit ny cho n khi lng khng i th cn li11,12 gam cht rn. Phn trm khi lng ca CaCO3trong mu olomit trn l:a) 54,35% b) 52% c) 94,96% d) 80,5%

300. Ure (H2N-CO-NH2) cng nh amoni nitrat (NH4NO3) u cung cp m (N) cho cy. Gi s gitin 1kg phn ure l 5 000 ng , cn 1 kg phn NH4NO3l 4 500 ng th loi phn no cungcp N r hn?a) NH4NO3 .b) Ure c) Gi c tng ng d) Hai loi N ny khc nhau nn khng sosnh c


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Bi tp n thi i hc

28

28

301. Tng qut mt nguyn t ha hc hin din trong t nhin gm mt s nguyn t ng v vi t lxc nh. Do khi lng nguyn t c dng tnh ton l khi lng nguyn t trung bnhca cc nguyn t ng v ca nguyn t trong t nhin vi t l xc nh.

Silic trong t nhin c ba ng v:

ng v Si28

14 c khi lng nguyn t 27,97693 vC, chim 92,23% s nguyn t.

ng v Si29

14 c khi lng nguyn t 28,97649 vC, chim 4,67% s nguyn t.

ng vSi

30

14

c khi lng nguyn t 29,97376 vC, chim 3,10% s nguyn t.Khi lng nguyn t ca Si l bao nhiu?a) 28,0855 b) 28,0000 c) 27,9245 d) 28,01498


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Bi tp n thi i hc

29

29

P N1 b 26 d 51 c 76 b 101 d

2 c 27 a 52 b 77 c 102 a

3 a 28 b 53 a 78 a 103 a

4 d 29 a 54 d 79 c 104 d

5 c 30 b 55 a 80 d 105 c

6 a 31 a 56 d 81 a 106 d

7 d 32 b 57 d 82 d 107 b

8 b 33 d 58 a 83 b 108 b9 a 34 c 59 c 84 d 109 a

10 c 35 a 60 a 85 c 110 d

11 b 36 c 61 b 86 c 111 b

12 d 37 c 62 d 87 d 112 a

13 a 38 d 63 d 88 b 113 b

14 c 39 a 64 a 89 b 114 d

15 d 40 b 65 c 90 a 115 c

16 b 41 c 66 c 91 d 116 b

17 a 42 c 67 b 92 a 117 c

18 b 43 d 68 d 93 c 118 d

19 b 44 d 69 d 94 b 119 a20 c 45 b 70 a 95 c 120 b

21 d 46 d 71 a 96 a 121 d

22 c 47 c 72 c 97 b 122 c

23 b 48 d 73 b 98 a 123 a

24 b 49 a 74 c 99 b 124 d

25 d 50 b 75 b 100 b 125 b

P N

126 b 148 b 170 a 192 d 214 d 236 b 258 b 280 b

127 d 149 d 171 c 193 c 215 c 237 b 259 c 281 a

128 a 150 a 172 d 194 b 216 b 238 d 260 d 282 c

129 d 151 d 173 b 195 a 217 d 239 a 261 a 283 d

130 c 152 b 174 b 196 c 218 c 240 b 262 d 284 c

131 d 153 d 175 d 197 d 219 a 241 d 263 b 285 a

132 d 154 c 176 b 198 b 220 b 242 c 264 c 286 d

133 b 155 b 177 b 199 a 221 d 243 c 265 d 287 b

134 a 156 a 178 b 200 c 222 c 244 b 266 a 288 c

135 d 157 b 179 c 201 d 223 d 245 d 267 b 289 d

136 d 158 c 180 d 202 c 224 a 246 a 268 c 290 d

137 c 159 b 181 c 203 b 225 d 247 c 269 c 291 a

138 b 160 d 182 a 204 a 226 d 248 d 270 b 292 b

139 a 161 c 183 d 205 b 227 c 249 d 271 a 293 a

140 a 162 a 184 a 206 b 228 b 250 b 272 d 294 b

141 d 163 b 185 d 207 c 229 b 251 d 273 c 295 c

142 a 164 d 186 c 208 d 230 c 252 a 274 b 296 a

143 d 165 c 187 b 209 d 231 a 253 b 275 d 297 b144 c 166 a 188 a 210 c 232 b 254 c 276 b 298 d

145 b 167 c 189 d 211 d 233 c 255 d 277 a 299 c

146 a 168 b 190 b 212 b 234 d 256 c 278 c 300 b

147 d 169 b 191 a 213 a 235 a 257 a 279 b 301 a


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Trc nghim ha v c Bin son: Quangduongbca30

Tuyen Chon Vo Co Hay

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