12

3

4

5

C;BU [&o cs.?.-r cooRr,Fc|sr,i--h on ollize fotlowing rons the cotour ts not due to a d-d transrttrri(A) c|o.I(B)cu(NHr;-(clri(r.o1u.'1oycon,,-The shape ol [Cu(NHrr]2' is square planar Cu2' in this compter rs(At sp'hybridised (8)dspz hybridised (C) spr of hybridise

.D)sp3 d, hybridisedWhich of ihe following complex ioo has a mag netic momerrr same as [C f (HrO ), ]3-(A) [Mn([lrO)u]a'1a1[Mn(HrO)u13.tcr[Fe(HrO)u]'- 1o1[Cu(HrO)Which of the following statements about the compter [CO Fu ]3 which is paramagnet

(B) Cobalt inv((D) the oxidati(

tf+

) in nature as correct?

,es sp3d2 hybridisalionr state of cobalt is +2

(A)(c)

Cobalt involves d2Sp3 hybrtdisationF is in zero oxidation state

f.,{atch the LIST- XAND LIST- Y and LIST - x

(A)(c) ADC,BCD,CBA,OAB (D) ACB,BDA:AC,DBO6 Among the foliowing complex ions, the one with the highest paramagnerism ts(A) tc(NHruf '(B)tFeruflcxcu(H,o)6F (D)tzn(H?o)El?'COMPREHENSION

ln the yea( 1892, Werner studied coordination compounds and proposed his theory to ,nderstand their chemistry He isolated difrenl .obaand tabulaied

compoundName Formula Colour

Total Number of lonsin solution

CoCl3 6NH3 Yellow 4

B CoCL 5NH3 Purple 3C CoClr 4NH3 Green 2

D CoCl.3NHi Violet 0of qm u arel',

9.(A) 28.79m,0 (B) 43.05, 0

octahedral

(C) 43.05sm, 14.359mexcess of aq AgN )r, respeclively(D) 14.3s,0

Out of given A, 8, C and O compounds the number of isomerc and the type of isomerism among th6 n rs(A)2, ionizational rsomerisms (B) 2, optical isornerism(C) 2, linkage isomerisms (D) No isomerism exhibitCOMPREHENSION

The detedion and stauctural determination can be done by conductance measurements. There is a decrease or irlctease in the value of electricaicondudance ot a solution in which complex formatton occurs. Ths is due to disappearance or production of ions of comparatively higher mobility eEThe additionof two moles of gtycine. NH:CHzCOOH to one mole of aqueous cupric actate solution decreases the solution conductivitybecause of ir:iformation of a dtelated complex [Cu(NH2CHTCOO)rI.This method can also give the useful information about the totalnumber of ions qlvon by a complex.

9. The effedive atomic numbea of copper in the above complex is(4 36 (s) 35 (D) 37'10: The IUPAC name oI the complex is

(A) Diglycene cuprate (l)(c) 33

(B) Diglycenate copper (l)(C) D0lycnato c.pper (ll) (D) Bis-glycenato cuprate (ll)11. tdentify the inconecl statements about the complex:(A) lt exhibits geometrical isomerlsm (B) lt is paramagnetic in nature(C) lt is a coloured complex (D) lt is tetrahedral and does iot show geomet.ical igome sm12. Ar1 octahedral complex is prepaieO by mixing Coclr and NH] O.1M;olulion of the complex was found 1o freeze at -0.372"C (cryoscopiconstant ofwater = 1.86 K kg/mol). The incorred statement about the.complex formed is:(A) the effeclive atomic number ofthe metal in the complex is 36. (B) the complex is coloured(C) lhe oxidation number of the metal in complex is +2 iD) lhe complex has distoded shape

13. Theincorrect statement regarding the complex Fe(CO)s is(A) the hybridisation of Fe is sp3d(C) the oxidation state of Fe in the complex is zero

(B) the Fe -

C bond has both o and ,r characters

(D) the EAN of Fe in complex is the same as the atomic number ot Kr

14. Zeise's salt b K[Pt(CrH.)Cl]1. The conect statements about the complex arc:(i) the structure ofthe complex is square planar(ii} the coordination number of Pt in the complex is 4.(iii) ln the structure of Zeise's salt, Cl atoms are present at lhe three corners and CHr=CHr is at the olhe. corner

l,ll and lV (B) l, ll and tll (C) l, ll, llland lV (D) ll,lllard lV15

\e/ ,i ,. o,,v nrAmong the following ligands which will form the mosl stable aomplex with the same metal ion in same cooadinalior fiLinrbcr')(A) MeNH,

Comprehension(B) en (C) Dren {D)Carbonale

.\\Six coordrnale octahedrat comptex of MF M'r' (en)r(Nor?Cl exists in severat isomeric ,orms. One of the isomers (X) in sot,rtion gtves *nite p\)1i?11",,"1""-"...:"^,,,:Tl:l'l:Tl:Tol:l "i r""t I .i,"""Jlio;";i; ;;;;. ,,," erhyrened,am,ne bur dces not,eacr w(h AsNo: A rhird iso, \(Z) on the other hand neither react; with ethyr""i oil.rli"i*ffigNb,l

NO,_t'l*'--..1...---'ll(A) "n I _.lM-:. | "" I crl_...-...11'"

:

.Nq

16 Which one of the fo owing is the possible stereochemicat structure of "X"?

17 The IUPAo narne of Y where Mr'r is co* end a'so assuming that NO; is co-ordinating the metal through its N, is(A) Trans-chtoro bis ethytenediamine nitrito-N-cobatt(U)nitrite(B) cis-chloro bis ethytenediamine nitrito-N-cobalt( l);itiite(C) cis-bis ethyenediamine dinitrito-N.cobat(It)chioride.

-

(O) trans- bis ethyenediamine dinitrilo-N-cobalt( l)chloride18 which of the fotlowing is the correct statement about the isomer'z" with M being Cr and considering that the metal is in strong o(enmagnetic fietd?(A) The gpin-only magnetic moment (pJ and effeclive atomic number (EAN) are 1.73 B.M. and 35, respectively.(B) (k) of the comptex is 3.87 B.M. and it is formed by drsp, trybridisaiion(C) F" is correspohding to one unpaired eleclron while the complex is formed by dzsp! hyb.idisation.

-

(D) The EAN ofthe metal in the complex is 35 and tt is formed'by sp3d, hybridiiation.Comprehension

Lle"t1lcllPf x ha.vlg compositron- [CrINH3).Br?l] was isolated in two fo.ms (x) and (Y). Form (X] reacts with A9NO j to give a pale yeflow pre]ioitiwnrcn rs padraly sotuble in excess of NH.OH whereas y gives a greenish ye ow precipitate whibh is insolubte tn NH.OH.19. the correct statements regarding X.y respectively are(A) The formula of (X) and (y) are [Cr(NH3)rlB.]Br and [C(NHrsBrrt]NH! respectivety(B) The formula of (X) and (y) are tC(NHr.tBrlBr and [C(NHj.Brrit respeciivety -(C) The rormula oI (X) and (Y) are both IC(NH3)rtlS--

(D) The tormula of (X) and (Y) are [C(NHr,tBrd(NHr,20. The hybrtulEation of Cr in X and y both are-.

(A) sp! d' (B) d sp, d (C) d, sp! (D) sp,21 The magnetic moment in both is(A) 5 (B) 3.87 (c) .Ea @t J222. Both the (X) form and (Y) form show

--

(A) linkage isornerism (B) coordination isomerism (C) ionizafion isomerism (D) non of these23. tho coned statements regarding X,y respeclively a.e(A) X -

cis fom optically inaciive: Y-cis form opticalty activr(B) X -

cis lorm optically inaciive; Y -

trans form opticafly active(C) The qis & trans lom of both X and Y ar opticalty active-

(O) The cis & trans form of both X and Y are optically inactiveComprahenslonWerner performed two experimentsExDedment- IHe prepared a compound (x) by reacting KCtwith ptctr. The compound (X) did not give any precipitate with AgNOr, but gave electricat conductancorresponding to 3 ions.Expe.iment

- 2

He took 0.319 I of CrCls.6HrO and passed through a catioo exchange resin and the acid coming out required 28.5m1 of 0.125 M NaOH, Hence24. The formula ofthe compound X is .(A) [KRC[CI, (B) K,tprct.l (c) K,{ptchl (D) Ktftct l25. The numberof precipltatable Cf ions in CrCh.oHrO is

(A) 2 (B) 3 (c) 1 (D) 026.

27.(D) dspr

* Iro.I

N

(D) en

The hybridisation in KdPtC16l(A) sp' (B) d'spr (c) sp! d'zThe number ol isomers ol [C(HrO)rlCh aroWhich of the following isomer is optically active?a) cis -[Co(en)rBrr]' b) kans, [Co(en)rBrr' Write structures of the comptexes.

29 Following two complexes are givenl

30

31

lNi(CN),(NHr)rl and K,tNi(Cl,D(Br),1Find hybridization of the centrai melal in each and calcul3te thek spin-only magnetic moment Eiving proper reason tor your ans\'rer AIiodraw the geornetrical isomers for each, lf at all possible

Out of IFeF6la and [Fe(CN)6]' , which is paramagnetic and why ?Explain lhe following:a) All the octahedral complexes of lli2t must be outer orbital complexes.b) Explain the geometry and magnetic nature of the fo[owing comprex ions on the basis or varence bond theory.

ii1 [Cu(NH. )o]2rWhich of the following molecutes are paramagnetic?Ki [Fe(CN)6], Kr lFe(CN)61, IC(H:Ol6CIr, N(co), NtCtlnln wh,Lts o{ lhe lo loJt/tng octaFedral compter Co rat no 27} sr the mag;[ude of Ao be nrghe,l-)

D [Co(NH3 )6]3-

(A) rco (NH,)6li' (B) [co(cN)u13 (c) [co(C?O")3]r 1o1 fco iuro,lu it- A EEE 2oo8All dlamag nt c complexes of N s square planar 0fco ordrnatron n!mber of N rs 4)the slalefient s tr.re'or'faLse JLrst fy yoLrr s|::,,,,,era) Why CLr(l) compound are not knola,n in aqueous sotutionb)Why the- alornic radii of 5d i.ansrt on elernents rs same as 4d lransrt cn elemenig[1i(H10)6]'3 gives vioLet cotoured aqueous sotrjtion but II,,4g( ,O)61'z so!lron isco;urtess wl y./

32

33

3435

36

37

39

40.

41.

42

43

44

tlr the

Octahed.alsquare PlanarTrigonalbipyramidal

llllllill 1: !lt!ll,hcr3i "lto*: s99T.:l,t!"lisomerism whirerlale.nent r'LPl(NH,l2Clrl shows geometrical isomer,sm whrte IZn(NHr))Cl-l doesn,tStatement 2 Pl is sp'hybndised rn lPltNHr)?CI?)whrre Zn is dsp, hynridrzed in 1ZntNH1rCr.1I can tri

Point ou

(A)l cis, llkans; both tetrahedral(B) lcis, lltrans;both square ptanar(C) ltrans. llcis: both tetrahedrat(D) ttrans, ll cis;both square ptanarStatement 1 The brown ring comple^, [Fe(HrO)5NO]SO. forrned in the deteclion of ntrate ion is paramagnetic in natureStatement 2: lt is a ouier orbital complex with sp3d'? hybridisation and conlains three unpaired electrons -STATEMENT-I : Tekahedral complexes do not show geometrjcat isomerismIIAIEMENT 2. The relat ve positrons of the tigands in the tetrahedrat comptex are the sanre wth respect to each otherSTATfVENt-r [PtCt,]':s a square p,anar conp,e\STATEI"4ENT-2 iCl is a weak tigandA complex ol cerlarn metal has the magnetii momenl of 4 9l BM whereas another comptex of lhe sanre metat w(lr s2rne ox datton si.ilihas zero magnelrc momenl The meral ron could be and if that metal ion Iorms a complex wrth EDTA then its EAN vrould be(A) Co".36 (B) I\,In,' 38 1Cy re,..lO (D) Fer..36

The freezing pointofan aqueous solution of KCN containing O.1892moukgwas -0.740C on adding 0.095 mol of Hg(CN)2 rh(

freezing point of solution was -0.53oC. Assuming that comptex as tormed accorcting to the equation

Hg (CN), + ru CN- -- [ug 1CN ;,,,*, ]nr Frncr ,arue or ,rr (appro]imatery)46. A complex salt coosisting of lhe formula Cu(NH3)x Cly.zH2O had a motecutar mass 277-5 g/mol. 1.388g otsattgave2BTg o

silver chloride and same amount when boiled with excess of sodium hydroxide libe.ated NH3 which neutratizes 10 mL of t M HCI Sum ochlorine aloms and NHe oresent oer molecule of combtcy

Statement 1: Oxatic acid H2CrO., can be used to clean rust stains irom sinks a;d bathtubsStalemenl 2 Oxalic acict is-a chelating lingand and form a stable complex w;th Fei'On keatment of {Ni(NHr.l" with concenirated HCl, lwo compounds I and ll having the same formula, N(NHrrCl, are obtarnedconverted into ll by boiling with dilute HCl. A solution of I reacts with oxatic acid to f;rm Ni(NHrdCrO.) whereaa does nol reactthe co.rect statement of the following

45.

theNH3 present per molecule of comptex

lnner orbttalOuter cxt rtai_-_

of Rh in lRn(py)3(en)Cll

fcolscny" l'Icctcru 1''Match column-l wilh column-ll.

{B- [CoF.]- is a tow spin comptex E lco(NHr6lf is a high spin complex{C, 6oth ICoF6]! & [Co(NH])s!]' are low spin comptexea(D) Bcth [CoF.]! & [Co(NH3)6]3' are high spin comptexes56. Which of the following statements are true?(A) CaF: decreases the melting point of the mixture during the elecirolysis of Alumina.

58

(B) NalAlFe is an outer otbital complex(C) p. for Na3AlF6 is 1.73 BM(D) Adding of HBF. prccipitates AlF3 from a solution of NarAlF.

ln Tollen's reagenl the oxidation number. co-ordihation number and effeclive alomic number of central mtal ion are respeclively(A) +1, 2, 50 (B)+2,2,50 (C)2.+1,50 (D)+1,1,50Which of the following pairs cohtains only tetrahedral comptexes?(A) [ZnCl.F and tMnola]'7 (B) tzn(Nt-t3).I] and Ni(CO).(c) lMncl.l? and [Ni(cN).)'? (D) izncr,]r rnd tN(cN).]1How many of the following salts are coloudessCuCl, NiCl,, Agl, TiCL, FeSOi, K,Cr,O?, (NHl)rSOr, KMnO., Cu?O, znSO.rhe comprex [co ltrienl]t' is more srabte than the -.cr., [co (en). ]'t bu""r"".(A) Trien b a chelating ligand whereas en is not.(B) en has comparatively less number of coordination centres and therefore, it dos not form stable complexes,

60

(A) Ii"'l "Cir, ]2- (p) one unpaked eleclron

(B) (q) d"p'(c) lLot. I' (r) sP? d2(D) lF" rH ,6 ,- z' 1 ,.,ll four unpahed electrons

(A) N i(co), (P) Sp'[rur1o'r;.]' (o) dsp'

ic)Ire 1cN1" l'' (R) sp'd'

(D)[rr,tnr" ]' (s) d'sp"

55 vr urE rJllowrng slaEmen6. wntcn ohe(A) [CoFs]- is a hrgh spin comptex & [((Br [CoFF'l- is a tow sDin comotex E lCis a low spin complexis a hhh sDin comole

(c) as" vatue is more positive for fCOltrienl]" if both the comptexes are formed from [CO(HrO)o ]"if both the complexes are formed from I Cd(HrO).trien

ldentify lhe complexes which are expected to be coloured :

(A) Ir(NOrd (B) tcu(NCcH3)11' 8F; 1c) [Cr1t'tH,1o ]t- sCr- 1o1 K, [VFu]

Which of the following are square planar comptexes

(A) INiico). lI ' '1)63 Which of the following are correct.({) [c.,(NH3)4]2* n^" d.spz hvbridization and squarepenar (B) [Ni1co;r] has sp3 hybridizarjon and rekahedrar(c) [Znbrq ]- rs tetrahed.al and diamagnelicWhich ofthe following staiement(s) is/are co.recl?

1,r1[Mn(HrO)r]at 1e1[Mn(H,O)"]3-The most stable ion ts :(A) [Fe(c,o. ), ]' 1e) [re1q.r1u]''

(A) cr < F' < CrO:' < NO; < CN-(c) C,O:- < F- < Ct- < NO; < CN-An aqueous solution of titanium chloride, when subjected to magnetic measuremenl, measured zero magnettc momenl Assumrng th',

-octahedratromplex in-aqueous solution, the formuiae of the eoripleFis:_(A) [Ti(H,o).]ct, rar [ri1H,o;.]cr. rcr [ricr,1H,o1.] ror fricr,1H,o;,1Ihe following complexes are given:

rur [prctz (.tH: )z i ro Ic,1ruur;, ]2* ror lrecta ]-

tol Ic.1NHu1r]3t is oclahedrar and paramasnetic54

66

67.

68.

69

(A) the complex CuCl42- exists but Cul42- does not (B) A bidentate ligand forms two o bonds.(C) Bidentate ligands form mo.e stable complex than monodentate ligand

t ')- t ,)ttot INilCNio]- is more srabre rhan lNiinrOto l"{Co(CN),Cl,l

-4 tCo(CN),C,Oi) + 2Ct The reacrion is onty possible if(A) Cl atom are cis iB) Ct atoms are trans(C) CN and Clare {rans to each other (D) A, C bolnThe complex KalFe(CN)61 is an oclahedral complex iornred by d'sp3 hybncizatrcn of Fe( ) This fact could be reveated by(A) lVagnetic moment determinalion of the complex(B) Molar conductance determination of the complex(C-)_Estimation of Fe in the comptex (D) Sotubitity of complex in wate.Of the following complexes, which one is dramagnetic rn nature?(A) Icor6l' 1a11ruicr.1'- (Cl lr.ri(r,rs,),1r. 1o1 Fri1Cr,r1.1'-The IUPAC name of lCo(NH3)6lCh is(A) hexaamminecobalt(lll)chtoride (B) trichtorohexaamminecobalt( t)(C) coball(lll)hexaamminechloride (D) hexaamminecobalt(l ) trichiorideHov,/ many ofthe following complexes have zero magnetic momentr(Fe(cN),, [Ni(H,o)"]'', [c'1n,o;"1-'. r

81. efftliHrOl"]'' comptex typically absorbs at arcund 600 nm tt is 6llowed to reacl v/ith ammcnia to form a new complexthat should have abso.ption ai .

1rit,,ns,-[Co(NH.;.cr,]' tzr "i" -fco 1Nt-t, ), (en),]'' r:r r,"n"-[co(NH, ). (un), ]'. (4) Nicl:-

(5) riF;- (6) CoF63Choose the correcl code :(A) (1), (2) are optically active, (3)is optically inactive(B) (2) is optically activei (1), (3) are optically inactive(C) (4), (5) are coloured and (6) is coloudess (D) (4),s coloured and (5), (0) are colou.less

(D) 320 nm

[r,,r1Nu";, ]''

82

(A) 800 nm (B) 580 nmAn ion M2., forms lhe comptexes [M (HrO)" ]'' , [f,f 1en;. ]'. ana [M Bru ]r- , matct rhe comptex whh the appropriate colour i(A) Green, blue and red (B) Blue,aed and green(C)Green red and blue ' (D) Red blue and green 'From the stabiity constanl (hypothetical value) given belowWhich ligand is lhe strongest2

(A) Cu" + aNH, ;-j [Cu(NH])il?' (K = 4 5 x 10'r)(B) cu" + 4cN'' .- tcu(cl.l)d'?- (K = 2 o x 1o'?I)(C)Cu'?'+2en

.

-- tcu(en),1" (K=30x10'5)(o) crrz' + 4H,o : ICu(H,o)4t" (K=9.5x10!)

84 The correct incaeasing order of molar conductivity of the compounds given below in their aqueous solution is:KtCo(NHr),(No).1;

I

(C) 620 nm

lc(NHr)dNOr3lilt

86.87

88.

89

90.

tc(NH3)5Nor3 [co(Nor6lr. MsIC(NH]XNoNt lv(A) Ir > tv>r> ll (B) < r< lv< rll ic) l< ti

(A) N(CO). (B) [Nict4l'?- lc) N(PPhrL (D) [Ni(cN). ]'104 Among the following ions which one has the hiohest oaramaooetism?(a) c(H:o)511'(b)lFe(H?o)61'1c)tcu(H.0.)61'{oxz"in'o).r) (1.9s3.1 Ma*)105 ln nltroprusside ion the iron and NO exist as Fe" and NO' rather than Fe'r and NO These forms c"n bc drrrercnlated by (i 998-2 LI arks)(a) estimaling the concentration ol ircn (b) measuring the concentralion of CN(c) measuring the solid state magnetic moment (d) thermally decomposing the compound.106. Match the complexes in Column I with their properties tisted in Column ll. lndicate your answer by darkening the approprlate iubbte s of the

4 x 4 matrix given in the ORS (2007)

Column I(A) [co(NHrr(Hro),]Cl,(B) [P(NH3)rCh](c) {co(H,O)5cllcl(D). [Ni(H,O)6]Cr'

Column ll(p) geomekical isomers(q) paramagnetic(r) diamagnetic(s) mqtal ion wilh +2 oxidation stateComprehension

- I

To an aqqeous solution of NiClr, KCN(excess) was passed, lhis formed a cyano complex X. Chloro complex Y was forrned when Conc HCI lexcessiwas added to the solution. (2006,

ttict, ---19L , Cyano complexu.ct, co9l]!L

' crro{o compre,

107. The IUPAC names of the complexes X, Y are repectively(A) potassium tetracyanonickelate (ll), potassium ietrachlororlickelale (ll)(B) potassium tetracyanonickel (ll), potassium tetrachloronickel (li)(C) potassium nickel (ll) tetracyaoale, potassium nickel (ll) tetrachlorate(O) potassium nickel tetracyanate (ll), potassium nickel tetrachlorate (ll)

108. Which of lhe following describes the magnetic behaviour of X and Y(A) both are paramagnetic (B) both are diamagnetic(C) X is diamagnetic and Y is paramagnetic with one unpaired eleclro,(D) X is diamagnetic and Y is paramagnetic with two unpairco eleckor109. The hybridrzation of Nickel in X and Y are respectively(A) dsp?, spl(B) sp'. dsplc) osp'. osp'{o) sp', sp'

110. ldentify the .omplexes which are expected to be coloured. Explain(0 lr(No3),I (ii) (cu(NccHrl' BFa(ii0 tc(NH.)ol" 3cr' (iv) K,lVFd (1991.2 Marks)11 1 . Write the IUPAC name of the compound ICr(NHTdNCS)I IZnClrl ls this compound .oloured?(1997-2 Ma*s)112 Dra\y ihe structures of tCo(NH!)513' IN(CN).F- and [Ni(CO)a] wrile the htbridization of atomic orbilals of the transiiion metal in each case.(2000.1 Ma*s)113. A metal complex having composition C(NHr). ClrBr has been isolated in I /vo fcrms (A) and (B) The form (Ai reacts with AgNOr lo glve a

white precipitate readily soluble in dilute aqueous anmonia, Mrereas {B) qives a pale yellow precipitate soluble rn conaenlraiedammonia Wrile the formula of(A) and (B) and state the hybridization of chromium in each Calculate their magnetic moments (spin --on yvalue). (2001-5 Matus)114 Deduce the structure ot INiCLF- and tNi(CN).F- considering the hybridEation ol the melalCalculate the magoetic momcnt (spin only) .ot the species. (2002-5 Marks)

115. Write the IUPAC nomenclature of the given complex along wirh its hybridization and structure K{C(NOXNH!)(CN).1 u = 1 73 BN,'l(20034 Ma*s)116. Whirh one ot lhe {ollowing co.nplexes is an outerorbital complox? IAIEEE 2004I(A) lFe(cNLf- (B) tMn(CN).r (c) tCo(NHJ6l! (O) tN(NHr)61''117. Whi:h one of the foltowing cyano complexel worrld exhibit the lowest value-of paramagnetic behavlour? ,(A) [Co(CN).|' (B) tC(CNhl* (C) [Mo(CN).I* (D) IFg(CN]61-[AIEEE 20051118. The value of th'spin only'magnetic moment fo. one of the following configuratrons is 2.84 BM. The c,oneci one is(A) d'(in weak ligand field) (B) d'(in skong ligand field) IAIEEE 20051(C) dt (in strong ligand field) {D) d! (rn weak as well as ln slrong fields)119. Nickel (Z = 28) combines with a uninegative monodentate iigand X- to form a paramagnetic complex [NrX.l'-. The number of unpairedelectron(s) in the nickel and geometry of this complex ion are, respectively IAIEEE 20051(A) one, square complex (B) two. square planar120. ln Fe(CO)5, the Fe

- C bond possesses

(A) ionic cha(acter

(C) one, tetrahed.al

(B) o-character only

(D) two, tetrahedral[AIEEE 2OO6]

(C) n-character only (O) both o and r characters121. How many EOTA (;thylenediaminetetraacetic acid) molecules are required to make an oc,tahedral complex with a Caz' ion?IATEEE 20061(A) One (B) Two (C) Six (O) Three

122. Ihe'spin-only:" magnetic moment lin units ol Bohr magnelon, (u6)] of Ni2' in aqueous solution would be (At. No. Ni = 28)[ATEEE 2oo6l

12X.

124. The coordination number and the oxidation state of the element

[E (en), (CrO4 )]N02 (where (en) is ethyldiamine) are respectivelv, AIEEF. 2o0B(A) 6 and 3 (B)6and2 lC],4 and2 (D)4and3125. How many of the followiog salt solutions grve precipitale with either AgNOr (or) Baclr solu|o

(A) 0 (8)1.73 (C) 2.84 (D)4e0Whlch one o{ the following has a square planar geometry? IAIEEE 20071( ) ICocLf_ _ (B) lFecl.l' (ql[!'cl.l' (E lPtcld:e coordinalion number and the oxidation state of the element E' in the cornple)(.

$Na,[ZnCL], KCIl,lqCl?6H,O Co(NHi)'Cl,Br. C(en)rClr, Ag{Ag(CN),1,INi1H,o1. iso., [co(so. )(NH.), ]No3, (NH.),so. Feso.6H,o

126 Wnte lhe total no. of complex ions where the metal exhiblt primary valency -2(among the following )(NH.).zrF,, Na.[Fe(cN)uNo] ru.[re(ctt)"] r,[co(cN),] K,Fe(Fe(cN)6). na.[es(s,o.;,rruoicu 1No.1, ], fet1ey;,]1etct.1

127. How many of the following complexes do not follgwing EAN RuleFe(co)s. [Ni1r'rn,1"]so,, x.[co1cn;u], x.fre1cru1.], Ni(co)., Na.lcr(c,o.).]. K.(Mn(cN)")[co1Nu,;"]cr.

128 .How many of the iollowing type of coordination compounds do not exhibil Geometrical isomerism Thd-Tekahedral Sqp= Square planar(v'/hel

M = centralmetal ator; A, B are mdno dentateiigands)t,(A3, MArB-Thd, l\4ABr-SOP, MA,BrSqpMA,, MAsB. MA'B'. MAZBTThd, MAZB

12g. tlow nrany of the following exhibit optical isomerism {here A, B, C, D are monodentate ligands)MA6. MAtrBl, MA'81, MA'BTThd, MABCD-SQPMArBrer (en

- eihylene diammifle), Trans M(en)rolr, cis L'l(en)rolz

130 How many of the follcwing a.e Tetrahedral complexes[ecicr.L', 1etcr.1'', [r,licto]-', [znct.]''? [Ni(cN).]-', [rt1Nr-r.1.1-' Ni1co1,, [cu(o'r;.1' Iet1utr,1.]''

1)A 2)B 3)A 4)B 5)C 6)8 7)A S)O 9)B 1O)C ',11)D 12)C 13)A 14)C15)C 16)4 17)B 18)B 19)B 2O)C 21)B 22)C 23)D 24\C 25)B 26)8 27)B 28)ClS33)B 37)D,A,C,B 38)C 39)A 4o)B 41)A 42tA 43)B 44)C 45\2 46)6 47)O.P,RS'Q48)P.Q,RS,RS 49)PS.PR,PS,OR 5O)PR,PR,PR,QS Si)S.P,O,N 52)PO,Q,RS,ORs3)o,Po,RS,RS S4)P,O,S,R s5)A 56)48 57)A 58)B 59)4 60)0 61)C 62)BCD63)ABCD 64)ABCD 6s)D 66)A 67)D 68)A 69)s 7O)2 71)C 72\A 73)A 71)4 75)B76)A 77)D ZSie eOiS S1)B 82)A 83)B 84)C 85)PARA 86)F 87)C 88)C 89)B 90)Bs1)A92)D93)894)895)A96)c97)898)A99)Aloo)A101)A102)8103)8104)81o5x106)PQS,PRS,QS,QS 107)A IOS)D 109)A 111)YES 116)D 117)A 118)B 119)D 120)D 121)4 122)C123)D 124)4 125)6 126)6 127\5 128)7 129\2 130)4

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