Common Types of Organic Reactions(Substitution, Addition, Elimination, and Rearrangement) NEET Questions

Organic Chemistry - Some Basic Principles of Organic Chemistry

Common Types of Organic Reactions(Substitution, Addition, Elimination, and Rearrangement) MCQ Questions


1.

Which of the following reactions is an example of nucleophilic substitution?

A.

CH3Cl + OH− → CH3OH + Cl−

B.

CH2=CH2 + HBr → CH3CH2Br

C.

CH3CH2OH → CH2=CH2 + H2O

D.

CH3CH2Br → CH3CH=CH2 + HBr

😑 View Answer Rough Work Error
ANSWER :

A. CH3Cl + OH− → CH3OH + Cl−

2.
Reaction of tertiary alkyl halide with aqueous KOH follows which mechanism?

NEET - 2018

A.
SN1
B.
SN2
C.
E2
D.
Addition
😑 View Answer Rough Work Error
ANSWER :
A. SN1
3.
In an SN1 reaction, the rate-determining step involves:
A.
Formation of carbocation
B.
Attack of nucleophile
C.
Departure of nucleophile
D.
Formation of transition state
😑 View Answer Rough Work Error
ANSWER :
A. Formation of carbocation
4.

Which of the following is an electrophilic addition reaction?

A.

CH2=CH2 + HBr → CH3CH2Br

B.

C6H6 + Br2 → C6H5Br + HBr

C.

CH3CH2OH → CH3CHO + H2

D.

CH3CH2Br + OH− → CH3CH2OH

😑 View Answer Rough Work Error
ANSWER :

A. CH2=CH2 + HBr → CH3CH2Br

5.
The E2 elimination reaction is characterized by:
A.
Two-step mechanism
B.
Carbocation intermediate
C.
Concerted one-step mechanism
D.
Formation of carbanion
😑 View Answer Rough Work Error
ANSWER :
C. Concerted one-step mechanism
6.
Which of the following undergoes rearrangement during reaction?
A.
Primary carbocation
B.
Secondary carbocation
C.
Tertiary carbocation
D.
All of the above
😑 View Answer Rough Work Error
ANSWER :
D. All of the above