· Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent...

29
1. The force between two bodies having identical electric charges a) is a force of repulsion b) is a force of repulsion if the charges are negative, and one of attraction if they are positive c) increases as the bodies are moved further apart d) is independent of the distance between them e) is directly proportional to the distance between them Ans: a Algorithm: No Chapter/Section: 8.1 Difficulty: Easy Keyword 1: Chemistry Keyword 2: general chemistry Keyword 3: bonding 2. Which of the following groups contains no ionic compounds? a) HCN, NO 2 , Ca(NO 3 ) 2 b) PCl 5 , LiBr, Zn(OH) 2 c) KOH, CCl 4 , SF 4 d) NaH, CaF 2 , NaNH 2 e) CH 2 O, H 2 S, NH 3 Ans: e Algorithm: No Chapter/Section: 8.1 Difficulty: Easy Keyword 1: Chemistry Keyword 2: general chemistry Keyword 3: bonding Keyword 4: ionic bonding 3. In which pair do both compounds exhibit predominantly ionic bonding? a) SCl 6 and HF b) Na 2 SO 3 and CH 4 c) KI and O 3 d) BaF 2 and H 2 O e) LiBr and BaO Ans: e Algorithm: Yes Chapter/Section: 8.1 Difficulty: Easy Keyword 1: Chemistry Keyword 2: general chemistry Keyword 3: bonding Keyword 4: ionic bonding 4. T F When a metal reacts with a nonmetal a covalent bond is formed. Ans: False Algorithm: No Chapter/Section: 8.1 Difficulty: Easy Keyword 1: Chemistry Keyword 2: general chemistry Keyword 3: bonding Keyword 4: ionic bonding 5. T F A nonpolar covalent bond results from the unequal sharing of a pair of electrons between atoms in a molecule. Ans: False Algorithm: No Chapter/Section: 8.1 Difficulty: Easy Keyword 1: Chemistry Keyword 2: general chemistry Keyword 3: bonding Keyword 4: covalent bonding 6. Atoms having equal or nearly equal electronegativities are expected to form a) no bonds b) polar covalent bonds c) nonpolar covalent bonds d) ionic bonds e) covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry Keyword 2: general chemistry Keyword 3: bonding Keyword 4: covalent bonding Keyword 5: electronegativity

Transcript of  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent...

Page 1:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

1. The force between two bodies having identical electric chargesa) is a force of repulsionb) is a force of repulsion if the charges are negative, and one of attraction if they are positivec) increases as the bodies are moved further apartd) is independent of the distance between theme) is directly proportional to the distance between themAns:  a Algorithm:  No Chapter/Section:  8.1 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding

2. Which of the following groups contains no ionic compounds?a) HCN, NO2, Ca(NO3)2

b) PCl5, LiBr, Zn(OH)2

c) KOH, CCl4, SF4

d) NaH, CaF2, NaNH2

e) CH2O, H2S, NH3

Ans:  e Algorithm:  No Chapter/Section:  8.1 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding

3. In which pair do both compounds exhibit predominantly ionic bonding?a) SCl6 and HFb) Na2SO3 and CH4

c) KI and O3

d) BaF2 and H2Oe) LiBr and BaOAns:  e Algorithm:  Yes Chapter/Section:  8.1 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding

4. T F When a metal reacts with a nonmetal a covalent bond is formed.Ans:  False Algorithm:  No Chapter/Section:  8.1 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding

5. T F A nonpolar covalent bond results from the unequal sharing of a pair of electrons between atoms in a molecule.Ans:  False Algorithm:  No Chapter/Section:  8.1 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding

6. Atoms having equal or nearly equal electronegativities are expected to forma) no bondsb) polar covalent bondsc) nonpolar covalent bondsd) ionic bondse) covalent bondsAns:  c Algorithm:  No Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

7. Choose the compound with the most ionic bond.a) LiClb) KFc) NaCld) LiFe) KClAns:  b Algorithm:  No Chapter/Section:  8.2 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

Page 2:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

8. Atoms with greatly different electronegativity values are expected to forma) no bondsb) covalent bondsc) triple bondsd) ionic bondse) none of theseAns:  d Algorithm:  No Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

9. Which of the following bonds is least polar?a) C—Ob) H—Cc) S—Cld) Br—Bre) They are all nonpolar.Ans:  d Algorithm:  No Chapter/Section:  8.2 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

10. For the elements Cs, F, and P, the order of increasing electronegativity is:a) Cs < F < Pb) Cs < P < Fc) P < F < Csd) F < Cs < Pe) none of theseAns:  b Algorithm:  Yes Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

11. For the elements Cs, F, and Cl, the order of increasing electronegativity is:a) F < Cl < Csb) Cs < Cl < Fc) Cl < Cs < Fd) F < Cs < Cle) none of theseAns:  b Algorithm:  No Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

12. In the gaseous phase, which of the following diatomic molecules would be the most polar?a) CsFb) CsClc) NaCld) NaFe) LiFAns:  a Algorithm:  No Chapter/Section:  8.2 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

Page 3:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

13. Based on electronegativities, which of the following would you expect to be most ionic?a) N2

b) CaF2

c) CO2

d) CH4

e) CF4

Ans:  b Algorithm:  No Chapter/Section:  8.2 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

14. In which case is the bond polarity incorrect?a) +H–F–

b) +K–O–

c) +Mg–H–

d) +Cl–I–

e) +Si–S–

Ans:  d Algorithm:  No Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

15. Metals typically have _______ electronegativity values.a) highb) lowc) negatived) noe) two of theseAns:  b Algorithm:  No Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

16. The electron pair in a C-F bond could be considereda) closer to C because carbon has a larger radius and thus exerts greater control over the shared electron

pairb) closer to F because fluorine has a higher electronegativity than carbonc) closer to C because carbon has a lower electronegativity than fluorined) an inadequate model since the bond is ionice) centrally located directly between the C and FAns:  b Algorithm:  No Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

17. Based on electronegativity differences, which of the following is most likely to be ionic?a) BaF2

b) Br2

c) PH3

d) NO2

e) CI4

Ans:  a Algorithm:  Yes Chapter/Section:  8.2 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity

Page 4:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

18. What is the correct order of the following bonds in terms of decreasing polarity?a) N-Cl, P-Cl, As-Clb) P-Cl, N-Cl, As-Clc) As-Cl, N-Cl, P-Cld) P-Cl, As-Cl, N-Cle) As-Cl, P-Cl, N-ClAns:  e Algorithm:  No Chapter/Section:  8.2 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity Keyword 6:  polar covalent bond

19. Which of the following bonds would be the most polar without being considered ionic?a) Mg-Ob) C-Oc) O-Od) Si-Oe) N-OAns:  d Algorithm:  No Chapter/Section:  8.2 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  electronegativity Keyword 6:  polar covalent bond

20. Which of the following bonds would be the least polar, yet still be considered polar covalent?a) Mg-Ob) C-Oc) O-Od) Si-Oe) N-O

21. Which of the following has the smallest radius?a) K+

b) Cl–

c) Rb+

d) S2–

e) ArAns:  a Algorithm:  No Chapter/Section:  8.4 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding Keyword 5:  ionic radii

22. Which of the following has the smallest radius?a) F–

b) Nec) O2–

d) Mg2+

e) Na+

Ans:  d Algorithm:  No Chapter/Section:  8.4 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding Keyword 5:  ionic radii

23. Which of the following pairs is isoelectronic?a) Li+ and K+

b) Na+ and Nec) I– and Cl–

d) S2– and Nee) Al3+ and B3+

Ans:  b Algorithm:  No Chapter/Section:  8.4 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding

Page 5:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

24. Which of the following arrangements is in order of increasing size?a) Ga3+ > Ca2+ > K+ > Cl– > S2–

b) S2– > Cl– > K+ > Ca2+ > Ga3+

c) Ga3+ > S2– > Ca2+ > Cl– > K+

d) Ga3+ > Ca2+ > S2– > Cl– > K+

e) Ga3+ > Ca2+ > S2– > K+ > Cl–

Ans:  a Algorithm:  No Chapter/Section:  8.4 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding Keyword 5:  ionic radii

25. T F The size in a series of isoelectronic ions increases as the nuclear charge increases.Ans:  False Algorithm:  No Chapter/Section:  8.4 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding Keyword 5:  ionic radii

26. The first electron affinity value for oxygen is _______ and the second electron affinity value is ________.a) unfavorable (endothermic), favorable (exothermic)b) unfavorable (endothermic), unfavorable (endothermic)c) favorable (exothermic), favorable (exothermic)d) favorable (exothermic), unfavorable (endothermic)e) More information is needed.Ans:  d Algorithm:  No Chapter/Section:  8.5 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding Keyword 5:  Born-Haber cycle

27. In the reaction between magnesium and sulfur, the magnesium atomsa) become anionsb) become cationsc) become part of polyatomic ionsd) share electrons with sulfure) crystallizeAns:  b Algorithm:  No Chapter/Section:  8.5 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  ionic bonding Keyword 5:  Born-Haber cycle

28. When electrons in a molecule are not found between a pair of atoms but move throughout the molecule, this is calleda) ionic bondingb) covalent bondingc) polar covalent bondingd) delocalization of the electronse) a dipole momentAns:  d Algorithm:  No Chapter/Section:  8.7 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  delocalization

29. Which of the following statements is false?a) Models are human interpretations, not the same as reality.b) Models are often wrong.c) Models usually start out simple and become more complex over time.d) We often learn more when a model is wrong than when it is right.e) A model should be discarded when any exception to it is found.Ans:  e Algorithm:  No Chapter/Section:  8.7 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding

Page 6:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

30. Choose the molecule with the strongest bond.a) F2

b) Cl2

c) Br2

d) I2

e) All are equal.Ans:  b Algorithm:  No Chapter/Section:  8.8 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  bond energy

32. Choose the molecule with the strongest bond.a) HFb) HClc) HBrd) HIe) All are equal.Ans:  a Algorithm:  No Chapter/Section:  8.8 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  bond energy

33. Choose the molecule with the strongest bond.a) CH4

b) H2Oc) NH3

d) HFe) All are equalAns:  d Algorithm:  No Chapter/Section:  8.8 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  bond energy

34. Which of the following molecules exhibits the greatest bond energy?a) F2

b) Cl2

c) Br2

d) I2

e) all the sameAns:  b Algorithm:  No Chapter/Section:  8.8 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  bond energy

35. As the number of bonds between two carbon atoms increases, which one of the following decreases?a) number of electrons between the carbon atomsb) bond energyc) bond lengthd) all of thesee) none of theseAns:  c Algorithm:  No Chapter/Section:  8.8 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding

36. Complete the Lewis structure for the molecule:

CH3

CH3

CH C

O

C N

This molecule has __________ single bonds and __________ multiple bonds.

Page 7:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

a) 4, 2b) 6, 3c) 11, 5d) 11, 2e) 13, 0Ans:  d Algorithm:  No Chapter/Section:  8.10 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  multiple bonds

Use the following to answer questions 37-39:

Draw the Lewis structures of the molecules below and use them to answer the following questions: I. BH3

II. NO2

III. SF6

IV. O3

V. PCl5

37. Which of the molecules obeys the octet rule?a) Ib) IIc) IIId) IVe) VAns:  d Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  octet rule

38. How many of the molecules have no dipole moment?a) 1b) 2c) 3d) 4e) They are all polar.Ans:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

39. Which of these molecules show resonance?a) I, IIb) II, IVc) II, Vd) III, IVe) III, VAns:  b Algorithm:  No Chapter/Section:  8.12 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  resonance

Page 8:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

Use the following to answer questions 40-42:

Using the following electronegativity values:C 2.5 Cl 3.0H 2.1 O 3.5

select from the following group the molecule that fits the given statement:a) CH3CHOb) CO2

c) CH3Cld) C2H6

e) none

40. This molecule contains a carbon atom with trigonal planar geometry.a) CH3CHOb) CO2

c) CH3Cld) C2H6

e) none of theseAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry

41. This molecule is the most polar.a) CH3CHOb) CO2

c) CH3Cld) C2H6

e) All are nonpolar.Ans:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

42. This molecule shows the smallest number of lone pairs in its Lewis structure.a) CH3CHOb) CO2

c) CH3Cld) C2H6

e) All have zero lone pairs.Ans:  d Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

Page 9:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

Use the following to answer questions 43-45:

Consider the compound crotonaldehyde, whose skeleton is:

H C1 C2 C3 C4 OH

H

H H H

43. How many electrons must be shown (as bonding or nonbonding electrons) in the Lewis structure of this molecule?a) 12b) 18c) 24d) 28e) 32Ans:  d Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

44. How many nonbonding electrons appear in the Lewis structure of this molecule?a) 2b) 4c) 6d) 8e) 10Ans:  b Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

45. Which carbon in this molecule has tetrahedral bonding?a) 1b) 2c) 3d) 4e) allAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

46. Which of the following molecules contains a double bond?a) CO2

b) NH3

c) H2Od) alle) noneAns:  a Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  multiple bonds

Page 10:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

47. When molten sulfur reacts with chlorine gas, a vile-smelling orange liquid forms that is found to have the empirical formula SCl. Which of the following could be the correct Lewis structure for this compound?

a) S Cl

b) ClS

c) S Cl Cl S

d) Cl S S Cl

e) Cl S S Cl:

Ans:  e Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

Use the following to answer questions 48-50:

Given the following Lewis structure:

CH3H2C C C C

H H H

1 2 3 4 5

48. How many unshared pairs of electrons are present in this molecule?a) 0b) 1c) 2d) 3e) 4Ans:  a Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

59. How many electrons are shared between carbons 1 and 2?a) 0b) 2c) 4d) 6e) 8Ans:  c Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

50. Which of the following compounds contains only one unshared pair of valence electrons?a) NH3

b) H2Oc) CH4

d) NaCle) BF3

Ans:  a Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

Page 11:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

51. T F The Lewis structure for CHCl3 has nine lone electron pairs.Ans:  True Algorithm:  No Chapter/Section:  8.10 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

52. Which of the following atoms cannot exceed the octet rule in a molecule?a) Nb) Sc) Pd) Ie) All of the atoms (A-D) can exceed the octet rule.Ans:  a Algorithm:  No Chapter/Section:  8.11 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

53. As indicated by Lewis structures, which of the following species could probably not exist as a stable molecule?a) NH3

b) N2H2

c) N2H4

d) N2H6

e) N2O4

Ans:  d Algorithm:  No Chapter/Section:  8.11 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

Page 12:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

54. The Lewis structure for H3BO3 isa)H O O H

OB

Hb)H O B

O

H

O H

c)H O B

O

H

O H

d)H O B

O

H

O H

e)H O B

O

H

O H

Ans:  d Algorithm:  No Chapter/Section:  8.11 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

55. In the Lewis structure for ICl2–, how many lone pairs of electrons are around the central iodine atom?

a) 0b) 1c) 2d) 3e) 4Ans:  d Algorithm:  No Chapter/Section:  8.11 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

56. In the Lewis structure for SF6, the central sulfur atom shares __________ electrons.a) 4b) 8c) 10d) 12e) None of the above, because SF6 is an ionic compound.Ans:  d Algorithm:  No Chapter/Section:  8.11 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

Page 13:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

57. Which of the following Lewis structures best describes BF3?a)

BF

FF

b)

BF

FF

c)

BF

FF

d)

BF

FF

e)

BF

FF

Ans:  a Algorithm:  No Chapter/Section:  8.11 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

58. Which of the following has an incomplete octet in its Lewis structure?a) SO2

b) IClc) CO2

d) F2

e) NOAns:  e Algorithm:  No Chapter/Section:  8.11 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

Page 14:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

Use the following to answer questions 59-61:

Consider the following molecules. I. BF3

II. CHBr3 (C is the central atom) III. Br2

IV. XeCl2

V. CO VI. SF4

Select the molecule(s) that fit the given statement.

59. These molecules violate the octet rule.a) I, II, IVb) I, III, IV, VIc) III, V, VId) I, IV, VIe) I, II, IV, VIAns:  d Algorithm:  No Chapter/Section:  8.11 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  exceptions to the octet rule

60. These molecules have a zero net dipole moment.a) III, Vb) I, III, IVc) III, IV, Vd) I, III, IV, VIe) none of themAns:  b Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

61. These molecules have a trigonal bipyramidal electron pair arrangement.a) II, IV, VIb) I, IVc) IV, VId) VI onlye) none of themAns:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model Keyword 6:  trigonal bipyramidal arrangement

Page 15:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

62. Select the best Lewis structure for acetone, CH3COCH3.a)

C

H

H

H C O C H

H

Hb)

C

H

H

HC

O

CH

H

Hc)

CH

HH

C O H C HH

d)

OHHH

C C C HH

H

e)

C

H

HH

C

H

HC

H

O

Ans:  b Algorithm:  No Chapter/Section:  8.12 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  Lewis dot formula

63. Which of the following exhibits resonance?a) NH3

b) SCl6

c) H2Od) SO2

e) At least two of the molecules (A-D) exhibit resonance.Ans:  d Algorithm:  Yes Chapter/Section:  8.12 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  resonance

64. Which of the following species is best described by drawing resonance structures?a) PH3

b) NH4+

c) O3

d) SO3

e) HCNAns:  c Algorithm:  No Chapter/Section:  8.12 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  resonance

Page 16:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

65. In the cyanide ion (CN–), the nitrogen has a formal charge ofa) -2b) -1c) 0d) 2e) More information is needed.Ans:  c Algorithm:  No Chapter/Section:  8.12 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  formal charge

66. Which has the greater N–O bond length, NO2– or NO3

–?a) NO2

b) NO3–

c) The bond lengths are the same.d) More information is needed.e) None of these (A-D).Ans:  b Algorithm:  No Chapter/Section:  8.12 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  covalent bonding Keyword 5:  resonance

67. Consider the following drawings:

Which of the following statements are true?

I. The electrons in each molecule tend to orient themselves around the mostelectronegative element.

II. Each molecular drawing follows the localized electron model.III. Both HF and CO2 are linear molecules and therefore polar.

IV. The bond angles of NH3 are slightly less than 109.5° because the lone pair compresses the angles between the bonding pairs.

a) I, III, IVb) I, II, IVc) I, II, IIId) II, IVe) All of the above statements are correct.Ans:  b Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding

68. If a compound has a number of individual dipoles, then: I. It is polar overall. II. There is an electronegativity difference between the bonded atoms. III. it is ionic. IV. It doesn't have resonance.

a) II onlyb) II, IVc) I, II, IVd) I, IIIe) All of the above statements are correct.Ans:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

Page 17:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

69. Of the following, which molecule has the largest bond angle?a) O3

b) OF2

c) HCNd) H2Oe) More than one of the above have equally large bond angles.Ans:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  bond angle

70. According to the VSEPR model, the arrangement of electron pairs around NH3 and CH4 isa) different, because in each case there are a different number of atoms around the central atomb) different, because in each case there are a different number of electron pairs around the central atomc) the same, because both nitrogen and carbon are both in the second periodd) the same, because in each case there are the same number of electron pairs around the central atome) different or the same, depending on the conditions leading to maximum repulsionAns:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Easy Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

71. The Cl–Kr–Cl bond angle in KrCl4 is closest toa) 90°b) 109°c) 120°d) 150°e) 360°Ans:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  bond angle

72. How many of the following molecules—SF2, SF4, SF6, SiO2—are polar?a) 0b) 1c) 2d) 3e) 4Ans:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

73. Which of the following molecules is non-polar overall?a) SF4

b) SF2

c) CCl4

d) H2Se) OCl2

Ans:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

Page 18:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

74. Which of the following is the correct order for molecules from most to least polar?a) CH4 > CF2Cl2 > CF2H2 > CCl4 > CCl2H2

b) CH4 > CF2H2 > CF2Cl2 > CCl4 > CCl2H2

c) CF2Cl2 > CF2H2 > CCl2H2 > CH4 = CCl4

d) CF2H2 > CCl2H2 > CF2Cl2 > CH4 = CCl4

e) CF2Cl2 > CF2H2 > CCl4 > CCl2H2 > CH4

Ans:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  dipole moment

75. Which of the following molecules has a nonlinear structure?a) XeF2

b) BeCl2

c) O3

d) CO2

e) N2O (central atom is N)Ans:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

Page 19:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

76. Which of the following molecules are nonlinear? NO2

–, C2H2, N3–, HCN, CO2, H2O2

a) C2H2, HCNb) CO2, N3

c) NO2–, H2O2

d) N3–, NO2

e) all are linearAns:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

77. How many of the following molecules or ions are linear?NH3 OF2 HCN CO2 NO2

a) 0b) 1c) 2d) 3e) 4Ans:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model Keyword 6:  linear arrangement

78. The molecular structure of SOCl2 isa) a) pyramidalb) b) none of thesec) c) octahedrald) d) trigonal planare) e) bentAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

79. The molecular structure of OF2 isa) a) pyramidalb) b) none of thesec) c) octahedrald) d) trigonal planare) e) bentAns:  e Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

80. The molecular structure of NCl3 isa) a) pyramidalb) b) none of thesec) c) octahedrald) d) trigonal planare) e) bentAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

Page 20:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

81. The molecular structure of BeF3– is

a) a) pyramidalb) b) none of thesec) c) octahedrald) d) trigonal planare) e) bentAns:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

82. The molecular structure of BrF6+ is

a) a) pyramidalb) b) none of thesec) c) octahedrald) d) trigonal planare) e) bentAns:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

83. The molecular structure of AsCl5 isa) trigonal bipyramidalb) square pyramidalc) distorted tetrahedrald) octahedrale) none of theseAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

84. The molecular structure of XeF5+ is

a) trigonal bipyramidalb) square pyramidalc) distorted tetrahedrald) octahedrale) none of theseAns:  b Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

85. What type of structure does the XeOF2 molecule have?a) pyramidalb) tetrahedralc) T-shapedd) trigonal planare) octahedralAns:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

Page 21:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

86. The bond angles about the carbon atom in the formaldehyde molecule, H2C=O, are about:a) 120°b) 60°c) 109°d) 180°e) 90°Ans:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  bond angle

87. Which of the following species has a trigonal bipyramid structure?a) NH3

b) IF5

c) I3–

d) PCl5

e) none of theseAns:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model Keyword 6:  trigonal bipyramidal arrangement

88. The bond angle in H2Se is about:a) 120°b) 60°c) 180°d) 109°e) 90°Ans:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  bond angle

89. Which ion is planar?a) NH4

+

b) CO32–

c) SO32–

d) ClO3–

e) all are planarAns:  b Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

Select the correct molecular structure for the given species from the choices below:

90. PF6–

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

Page 22:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

91. PCl4+

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  b Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

92. XeF6

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  e Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

93. NI3

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

94. SiH4

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  b Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

95. ClO2

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  e Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

Page 23:  · Web view... no bonds b)polar covalent bonds c)nonpolar covalent bonds d)ionic bonds e)covalent bonds Ans: c Algorithm: No Chapter/Section: 8.2 Difficulty: Easy Keyword 1: Chemistry

96. IF4–

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  c Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

97. SO32–

a) pyramidalb) tetrahedralc) square planard) octahedrale) none of theseAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

98. H2Oa) linearb) trigonal planarc) tetrahedrald) bente) none of theseAns:  d Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

99. CO2

a) linearb) trigonal planarc) tetrahedrald) bente) none of theseAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model

100. BeCl2

a) linearb) trigonal planarc) tetrahedrald) bente) none of theseAns:  a Algorithm:  No Chapter/Section:  8.13 Difficulty:  Moderate Keyword 1:  Chemistry Keyword 2:  general chemistry Keyword 3:  bonding Keyword 4:  molecular geometry Keyword 5:  the valence-shell electron-pair repulsion model