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1

AIPMT 2011 Mains

MCQ (Single Correct Answer)
The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds:
A
III > II > I
B
II > I > III
C
I > III > II
D
I > II > III

Explanation

The reactivity of the carbonyl group towards the nucleophilic addition reactions depend upon the magnitude of the positive charge on the carbonyl carbon atom (electronic factor) and also on the crowding around the carboxyl carbon atom in the transition state (steric factor). Both these factors predict the following order
I > II > III
2

AIPMT 2011 Mains

MCQ (Single Correct Answer)
An organic compound A on treatment with NH3 gives B, which on heating gives C. C when treated with Br2 in the presence of KOH produces ethyl amine. Compound A is
A
CH3COOH
B
CH3CH2CH2COOH
C
D
CH3CH2COOH

Explanation

3

AIPMT 2011 Prelims

MCQ (Single Correct Answer)
In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D.
A
B
C
D

Explanation

4

AIPMT 2011 Mains

MCQ (Single Correct Answer)
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

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