1
MCQ (Single Correct Answer)

AIPMT 2012 Mains

Consider the following reaction


The product A is
A
C6H5CHO
B
C6H5OH
C
C6H5COCH3
D
C6H5Cl

Explanation



It is Rosenmund’s reaction.
2
MCQ (Single Correct Answer)

AIPMT 2012 Prelims

Predict the products in the given reaction.

A
B
C
D

Explanation

3
MCQ (Single Correct Answer)

AIPMT 2012 Mains

Consider the reaction :
RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2

What sort of reaction is it?
A
Electrophilic addition-elimination reaction
B
Free radical addition-elimination reaction
C
Electrophilic substitution-elimination reaction
D
Nucleophilic addition-elimination reaction

Explanation

RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2

Such reactions take place in slightly acidic medium and involve nucleophilic addition of the ammonia derivative.
4
MCQ (Single Correct Answer)

AIPMT 2012 Prelims

CH3CHO and C6H5CH2CHO can be distinguished chemically by
A
Benedict's test
B
Iodoform test
C
Tollen's reagent test
D
Fehling's solution test

Explanation

CH3CHO gives Iodoform test but C6H5CH2CHO does not give Iodoform test due to absence of methyl group.

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