Alkanes (Conformations: Sawhorse and Newman Projections : Mechanism of Halogenation ) NEET Questions

Organic Chemistry - Hydrocarbons

Alkanes (Conformations: Sawhorse and Newman Projections : Mechanism of Halogenation ) MCQ Questions


7.
Sawhorse projection gives a view of the molecule from an angle showing:
A.
Only front carbon
B.
Only back carbon
C.
Both carbons in zigzag manner
D.
Straight chain
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ANSWER :
C. Both carbons in zigzag manner
8.
In the halogenation of alkanes, the chain initiation step involves:
A.
Free radical generation
B.
Bond formation
C.
Recombination
D.
All of these
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ANSWER :
A. Free radical generation
9.
The most reactive halogen in alkane halogenation is:
A.
Fluorine
B.
Chlorine
C.
Bromine
D.
Iodine
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ANSWER :
A. Fluorine
10.
Which halogenation is not feasible due to high activation energy?
A.
Chlorination
B.
Bromination
C.
Iodination
D.
Fluorination
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ANSWER :
C. Iodination
11.
Chlorination of methane is initiated by:
A.
Sunlight
B.
Darkness
C.
Pressure
D.
Acid
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ANSWER :
A. Sunlight
12.
In the halogenation of alkanes, the propagation step involves:

NEET - 2018

A.
Free radical attacks alkane
B.
Two radicals combine
C.
Radical disappears
D.
Halogen forms ion
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ANSWER :
A. Free radical attacks alkane