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1

AIPMT 2007

MCQ (Single Correct Answer)
The product formed in Aldol condensation is
A
a beta-hydroxy aldehyde or a beta-hydroxy ketone
B
an alpha-hydroxy aldehyde or ketone
C
an alpha, beta unsaturated ester
D
a beta-hydroxy acid.

Explanation

The aldehydes or ketones containing $$\alpha $$-H atom in presence of dilute alkali undergo self condensation reaction to form $$\beta $$-hydroxyaldehyde or $$\beta $$-hydroxyketone. This reaction is known as Aldol condensation.
2

AIPMT 2007

MCQ (Single Correct Answer)
Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
A
Cope reduction
B
Dow reduction
C
Wolf-Kishner reduction
D
Clemmensen reduction

Explanation

Clemmensen reduction : Aldehydes and ketones are reduced to the corresponding alkanes by means of amalgamated Zinc and HCl.
3

AIPMT 2006

MCQ (Single Correct Answer)
In a set of reactions propionic acid yielded a compound D.

The structure of D would be
A
CH3CH2NH2
B
CH3CH2CH2NH2
C
CH3CH2CONH2
D
CH3CH2NHCH3

Explanation

4

AIPMT 2006

MCQ (Single Correct Answer)
Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields
A
ethyl propionate
B
ethyl butyrate
C
acetoacetic ester
D
methyl acetoacetate

Explanation

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