1
MCQ (Single Correct Answer)

AIPMT 2011 Prelims

In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.
A
B
C
D

Explanation

2
MCQ (Single Correct Answer)

AIPMT 2011 Mains

Match the compounds given in List-I with List-II and select the suitable option using the code given below.

List-I
List-II
(A) Benzaldehyde (i) Phenolphthalein
(B) Phthalic anhydride (ii) Benzoin condensation
(C) Phenyl benzoate (iii) Oil of wintergreen
(D) Methyl salicylate (iv) Fries rearrangement
A
(A)-(iv),  (B)-(i),  (C)-(iii),  (D)-(ii)
B
(A)-(iv),  (B)-(ii),  (C)-(iii),  (D)-(i)
C
(A)-(ii),  (B)-(iii),  (C)-(iv),  (D)-(i)
D
(A)-(ii),  (B)-(i),  (C)-(iv),  (D)-(iii)

Explanation

(A) Benzaldehyde          (ii) Benzoin condensation

(B) Phthalic anhydride    (i) Phenolphthalein

(C) Phenyl benzoate       (iv) Fries rearrangement

(D) methyl salicylate      (iii) Oil of wintergreen
3
MCQ (Single Correct Answer)

AIPMT 2011 Prelims

Clemmensen reduction of a ketone is carried out in the presence of which of the following?
A
Glycol with KOH
B
Zn-Hg with HCl
C
LiAlH4
D
H2 and Pt as catalyst

Explanation

4
MCQ (Single Correct Answer)

AIPMT 2010 Mains

Which one of the following compounds will be most readily dehydrated?
A
B
C
D

Explanation

The intermediate is carbocation which is destabilised by C = O group (present on - carbon to the –OH group) in the first three cases. In (c), –hydrogen is more acidic which can be removed as water. Moreover, the positive charge on the intermediate carbocation is relatively away from the C = O group.

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