1
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?
A
B
C
D

Explanation

$$\pi $$ bond is transferred after leaving Cl then nucleophile will attack a stable carbocation.

2
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

Given :

Which of the given compounds can exhibit tautomerism?
A
II and III
B
I, II and III
C
I and II
D
I and III

Explanation



In first two cases $$\alpha $$-H participates in tautomerism.

And in third case, $$\gamma $$-H participate in tautomerism.
3
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

The total number of $$\pi $$-bond electrons in the following structure is

A
12
B
16
C
4
D
8

Explanation

No. of double bonds = 4

No. of $$\pi $$ bond electrons

= 2 × no. of double bond

= 2 × 4 = 8
4
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

Treatment of cyclopentanone


with methyl lithium gives which of the following species ?
A
Cyclopentanonyl radical
B
Cyclopentanonyl biradical
C
Cyclopentanonyl anion
D
Cyclopentanonyl cation

Explanation

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