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


7.
Which carbon centre is most likely to undergo SN1 reaction the fastest?
A.
Primary (1°) carbon
B.
Vinylic carbon
C.
Tertiary (3°) carbon
D.
Methyl carbon
😑 View Answer Rough Work Error
ANSWER :
C. Tertiary (3°) carbon
8.
Which substrate is most reactive in an SN2 reaction?
A.
CH3CH2C(CH3)2Br
B.
(CH3)3CBr
C.
(CH3)2CHBr
D.
CH3Br
😑 View Answer Rough Work Error
ANSWER :
D. CH3Br
9.
The SN2 mechanism is characterized by:
A.
Retention of configuration
B.
Inversion of configuration (Walden inversion)
C.
Racemisation
D.
No stereochemical change
😑 View Answer Rough Work Error
ANSWER :
B. Inversion of configuration (Walden inversion)
10.
Which of the following is the BEST leaving group in nucleophilic substitution?
A.
F⁻
B.
NH2⁻
C.
OH⁻
D.
I⁻
😑 View Answer Rough Work Error
ANSWER :
D. I⁻
11.
Friedel-Crafts alkylation of benzene with CH3Cl in presence of anhydrous AlCl3 produces:
A.
Toluene (methylbenzene)
B.
Cyclohexane
C.
Chlorobenzene
D.
Benzyl chloride
😑 View Answer Rough Work Error
ANSWER :
12.
In the reaction CH3COCH3 + HCN → (CH3)2C(OH)(CN), the CN⁻ acts as a:
A.
Lewis acid
B.
Nucleophile (nucleophilic addition)
C.
Free radical
D.
Electrophile
😑 View Answer Rough Work Error
ANSWER :
B. Nucleophile (nucleophilic addition)