Nature of C-X Bond; Mechanisms of Substitution Reactions NEET Questions

Organic Chemistry - Organic Compounds Containing Halogens

Nature of C-X Bond; Mechanisms of Substitution Reactions MCQ Questions


13.
Which of the following alkyl halides is most likely to undergo SN1 substitution?
A.
Methyl chloride
B.
Primary alkyl chloride
C.
Tertiary butyl chloride
D.
Secondary alkyl chloride
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ANSWER :
C. Tertiary butyl chloride
14.
What is the intermediate formed in an SN1 reaction?
A.
Carbocation
B.
Free radical
C.
Carbanion
D.
None of the above
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ANSWER :
A. Carbocation
15.
Which of the following solvents favors SN2 reactions?
A.
Polar aprotic solvent
B.
Polar protic solvent
C.
Non-polar solvent
D.
None of the above
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ANSWER :
A. Polar aprotic solvent
16.
Which of the following halides undergoes substitution through an SN2 mechanism?
A.
Secondary alkyl chloride
B.
Tertiary alkyl chloride
C.
Primary alkyl chloride
D.
None of the above
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ANSWER :
C. Primary alkyl chloride
17.
Which of the following factors does not affect the rate of an SN1 reaction?
A.
Temperature
B.
Concentration of the alkyl halide
C.
Concentration of the nucleophile
D.
Quality of the leaving group
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ANSWER :
C. Concentration of the nucleophile
18.
Which of the following is true for an SN1 mechanism?
A.
The nucleophile attacks before the leaving group departs
B.
The reaction rate depends on the concentration of the alkyl halide
C.
One nucleophile is involved in the rate-determining step
D.
None of the above
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ANSWER :
B. The reaction rate depends on the concentration of the alkyl halide