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Aldehydes, Ketones and Carboxylic Acids
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Preparation of aldehydes and ketones
JEE Main level
Single correct option
Difficulty 2 of 3
co029
Ethanenitrile is treated with
SnCl
X
2
and
HCl
, and the resulting imine hydrochloride is hydrolysed with water (Stephen reaction). The product is
A
propanone
B
ethanoic acid
C
ethanamine
D
ethanal
Answer: D
SnCl
X
2
/
HCl
reduces
R
−
C
≡
N
to the aldimine salt
RCH
=
NH
⋅
HCl
. Hydrolysis of the aldimine gives
RCHO
, here
CH
X
3
CHO
.
Practice Aldehydes, Ketones and Carboxylic Acids
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