1
MCQ (Single Correct Answer)

NEET 2017

Identify $$A$$ and predict the type of reaction.
A
B
C
D

Explanation


m-Bromoanisole gives only the respective meta substituted aniline. This is a substitution reaction which goes by an elimination-addition pathway.
2
MCQ (Single Correct Answer)

NEET 2016 Phase 2

Consider the reaction,
CH3CH2CH2Br + NaCN $$ \to $$ CH3CH2CH2CN + NaBr

This reaction will be the fastest in
A
ethanol
B
methanol
C
N, N' -dimethylformamide (DMF)
D
Water

Explanation

The reaction,
CH3CH2CH2Br + NaCN $$ \to $$ CH3CH2CH2CN + NaBr

follows SN2 mechanism which is favoured by polar aprotic solvent i.e., N, N'–dimethylformamide (DMF).
3
MCQ (Single Correct Answer)

NEET 2016 Phase 1

Which of the following biphenyls is optically active ?
A
B
C
D

Explanation

Ortho substituted biphenyls are optically active as both the rings are not in one plane and their mirror images are non-superimposable.
4
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

The reaction of C6H5CH $$=$$ CHCH3 with HBr produces
A
B
C
D

Explanation

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