How many electrons are there in the valence shell of

54. How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH
3
+ ?
a. 4
b. 5
c. 6
d. 7
ANS: C
55. How many electrons are there in the valence shell of the carbon atom of the methyl anion, CH
3

?
56. How many electrons are there in the valence shell of the oxygen atom of water?
57. How many electrons are there in the valence shell of the nitrogen atom of ammonia?
58. What is the approximate value of the H  C  H bond angles in a methyl cation, CH
3
+ ?
a. 90 
b. 109 
c. 120 
d. 180 
ANS: C
59. What is the approximate value of the H  C  H bond angles in a methyl anion, CH
3
 ?
60. Which atomic orbitals overlap to form the carbon-hydrogen  bonding molecular orbitals of ethane,
CH
3
CH
3
?
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61. Which atomic orbitals overlap to form the carbon-hydrogen  bonding molecular orbitals of ethene,
H
2
C=CH
2
?
62. Which atomic orbitals overlap to form the carbon-carbon  and  bonding molecular orbitals of
ethene, H
2
C=CH
2
?
a. C2 sp 3 + C2 sp 3 , and C2 p + C2 p
b. C2 sp 2 + C2 sp 2 , and C2 sp 2 + C2 sp 2
c. C2 sp
2
+ C2 sp
2
, and C2 p + C2 p
d. C2 sp
3
+ C2 sp
3
, and C2 sp
2
+ C2 sp
2
ANS: C
63. Which atomic orbitals overlap to form the carbon-hydrogen  bonding molecular orbitals of ethyne,
HC  CH?
64. Which atomic orbitals overlap to form the carbon-carbon  molecular bonding orbital of ethyne,
HC  CH?
65. Which of the following is a primary (1  ) alcohol?
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66. Which of the following is a tertiary (3  ) alcohol?
a. 1
b. 2
c. 3
d. 4
ANS: C
67. Which of the following is a primary (1  ) amine?
68. Which of the following is a secondary (2  ) amine?