02 problem set

© 2013 Pearson Education, Inc.

2.1 Which of the following does not describe a sigma bond?

a) Overlap of two s orbitals

b) Overlap of one s orbital and the end of a p orbital

c) Side-by-side overlap of p orbitals.

d) Overlap of the end of two p orbitals


a) Overlap of two s orbitals

b) Overlap of one s orbital and the end of a p orbital

c) Side-by-side overlap of p orbitals

d) Overlap of the end of two p orbitals

Explanation:The side-by-side overlap of p orbitals is a pi bond.

2.1 Which of the following does not describe a sigma bond?


2.2 How many sigma and pi bonds are in a double bond?

a) Two sigma bonds

b) Two pi bonds

c) One sigma bond and one pi bond

d) Two gamma bonds

e) One sigma bond and one gamma bond


a) Two sigma bonds

b) Two pi bonds

c) One sigma bond and one pi bond

d) Two gamma bonds

e) One sigma bond and one gamma bond

Explanation:The sigma bond is from the overlap of s orbitals; the pi bond is fromthe overlap of p orbitals.

2.2 How many sigma and pi bonds are in a double bond?


2.3 Give the bond angle for CH4.

a) 90o

b) 104.5o

c) 107o

d) 109.5o

e) 120o


a) 90o

b) 104.5o

c) 107o

d) 109.5o

e) 120o

Explanation:CH4 has a tetrahedral shape, is sp3 hybridized, and has a bond angle of 109.5o.

2.3 Give the bond angle for CH4.


2.4 Give the hybridization for CH3CN.

a) sp

b) sp2

c) sp3

d) sp4


a) sp

b) sp2

c) sp3

d) sp4

2.4 Give the hybridization for CH3CN.


2.5 Give the shape for CH3CN.

a) Bent

b) Linear

c) Trigonal planar

d) Trigonal pyramidal

e) Tetrahedral


a) Bent

b) Linear

c) Trigonal planar


e) Tetrahedral

2.5 Give the shape for CH3CN.


2.6 Give the bond angle for CH3CN.

a) 90o

b) 104.5o

c) 107o

d) 109.5o

e) 180o


a) 90o

b) 104.5o

c) 107o

d) 109.5o

e) 180o

2.6 Give the bond angle for CH3CN.


2.7 Give the hybridization for the carbon in H2CO.

a) sp

b) sp2

c) sp3

d) sp4


a) sp

b) sp2

c) sp3

d) sp4

2.7 Give the hybridization for the carbon in H2CO.


2.8 Give the bond angle for H2CO.

a) 90o

b) 120o

c) 107o

d) 109.5o

e) 180o


a) 90o

b) 120o

c) 107o

d) 109.5o

e) 180o

2.8 Give the bond angle for H2CO.


2.9 Give the shape for H2CO.

a) Bent

b) Linear

c) Trigonal planar


e) Tetrahedral


a) Bent

b) Linear

c) Trigonal planar


e) Tetrahedral

2.9 Give the shape for H2CO.


2.10 Give the hybridization for the nitrogen in NH4

+.

a) sp

b) sp2

c) sp3

d) sp4


a) sp

b) sp2

c) sp3

d) sp4

2.10 Give the hybridization for the nitrogen in NH4

+.


2.11 Identify the type of isomer for CH3OCH3 and CH3CH2OH.

a) Stereoisomer

b) Conformational isomer

c) Constitutional isomer

d) Geometric isomer


a) Stereoisomer

b) Conformational isomer

c) Constitutional isomer

d) Geometric isomer

Explanation:

Constitutional isomers differ in the way the atoms are connected.

2.11 Identify the type of isomer for CH3OCH3 and CH3CH2OH.


2.12 Identify the compound that has London dispersion forces.

a) CH3OCH3

b) CH3CH2OH

c) CH3CH3

d) CH3Cl

e) (CH3)3N


a) CH3OCH3

b) CH3CH2OH

c) CH3CH3

d) CH3Cl

e) (CH3)3N

Explanation: London dispersion forces are forces between nonpolar molecules.

2.12 Identify the compound that has London dispersion forces.


2.13 Identify the compound that has hydrogen bonding.

a) CH3OCH3

b) CH3CH2OH

c) CH3CH3

d) CH3Cl

e) (CH3)3N


a) CH3OCH3

b) CH3CH2OH

c) CH3CH3

d) CH3Cl

e) (CH3)3N

Explanation: A compound must have an H–F, N–H, or O–H bond to have hydrogen bonding.

2.13 Identify the compound that has hydrogen bonding.


2.14 Explain why gasoline does not dissolve in water.

a) Both are nonpolar.

b) Both are polar.

c) Gasoline is polar; water is nonpolar.

d) Water is polar; gasoline is nonpolar.



b) Both are polar.

c) Gasoline is polar; water is nonpolar.

d) Water is polar; gasoline is nonpolar.

Explanation: Gasoline does not dissolve in water because it would have to breakup the hydrogen bonding of water.

2.14 Explain why gasoline does not dissolve in water.


2.15 Explain why ethanol dissolves in water.


b) Both are polar.

c) Ethanol is polar; water is nonpolar.

d) Water is polar; ethanol is nonpolar.



b) Both are polar.

c) Ethanol is polar; water is nonpolar.

d) Water is polar; ethanol is nonpolar.

Explanation:Ethanol and water are both polar.

2.15 Explain why ethanol dissolves in water.


2.16 Identify the general structure of CH3CH2OH.

a) Ether

b) Alcohol

c) Aldehyde

d) Ketone

e) Ester


a) Ether

b) Alcohol

c) Aldehyde

d) Ketone

e) Ester

Explanation: Alcohols have the general structure of ROH.

2.16 Identify the general structure of CH3CH2OH.


2.17 Identify the general structure of CH3CH2COOH.

a) Ester

b) Carboxylic acid

c) Ether

d) Aldehyde

e) Ketone


a) Ester

b) Carboxylic acid

c) Ether

d) Aldehyde

e) Ketone

Explanation: A carboxylic acid has a general structure of RCOOH.

2.17 Identify the general structure of CH3CH2COOH.


2.18 Identify the general structure of CH3CH2CH2CHO.

a) Ester

b) Carboxylic acid

c) Ether

d) Aldehyde

e) Ketone


a) Ester

b) Carboxylic acid

c) Ether

d) Aldehyde

e) Ketone

Explanation: An aldehyde has a general structure of RCHO.

2.18 Identify the general structure of CH3CH2CH2CHO.


2.19 Identify an amine.

a) CH3CH2NHCH3

b) CH3CH2CN

c) CH3CH2CONH2

d) CH3CH2CHO

e) CH3COCH2CH3


a) CH3CH2NHCH3

b) CH3CH2CN

c) CH3CH2CONH2

d) CH3CH2CHO

e) CH3COCH2CH3

Explanation: An amine has a formula of RNH2, R2NH, or R3N.

2.19 Identify an amine.


2.20 Identify a nitrile.

a) CH3CH2NHCH3

b) CH3CH2CN

c) CH3CH2CONH2

d) CH3CH2CHO

e) CH3COCH2CH3


a) CH3CH2NHCH3

b) CH3CH2CN

c) CH3CH2CONH2

d) CH3CH2CHO

e) CH3COCH2CH3

Explanation: A nitrile has a formula of RCN.

2.20 Identify a nitrile.

02 problem set

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