Covalent Bond Fission -Homolytic and Heterolytic, Free Radicals, Carbocations and Carbanions,... NEET Questions

Organic Chemistry - Some Basic Principles of Organic Chemistry

Covalent Bond Fission -Homolytic and Heterolytic, Free Radicals, Carbocations and Carbanions,... MCQ Questions


7.
Which of these is NOT a reactive intermediate?
A.
Carbanion
B.
Carbocation
C.
Free radical
D.
Water
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ANSWER :
D. Water
8.

The bond fission type in CH3–CH2Cl by UV light is

A.

Homolytic

B.

Heterolytic

C.

Ionization

D.

None of these

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ANSWER :

A. Homolytic

9.

Which of the following is most stable?

A.

CH3•

B.

(CH3)2CH•

C.

C6H5•

D.

(CH3)3C•

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ANSWER :

D. (CH3)3C•

10.

What is the hybridization of carbon in methyl carbocation (CH3+)?

A.

sp3

B.

sp

C.

sp2

D.

dsp2

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ANSWER :

C. sp2

11.
Carbanions are
A.
Positive species
B.
Neutral
C.
Free radicals
D.
Negatively charged ions
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ANSWER :
D. Negatively charged ions
12.
The stability order of carbocations is
A.
Primary > Secondary > Tertiary
B.
Tertiary > Secondary > Primary
C.
Secondary > Tertiary > Primary
D.
Primary > Tertiary > Secondary
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ANSWER :
B. Tertiary > Secondary > Primary