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Question

CH3CH2ClNaCN−−−−−→XNi/H2−−−−−→YAceticanhydride−−−−−−−−−−−−−−→Z
Z in the above reaction sequence is:

A
CH3CH2CH2NHCOCH3
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B
CH3CH2CH2NH2
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C
CH3CH2CH2CONHCH3
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D
CH3CH2CH2CONHCOCH3
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Solution

The correct option is B CH3CH2CH2NHCOCH3
Z in the given reaction sequence is CH3CH2CH2NHCOCH3.
CH3CH2ClNaCN−−−−CH3CH2CNXNi/H2−−−−CH3CH2CH2NH2YAceticanhydride−−−−−−−−−−−−−
CH3CH2CH2NHCOCH3Z
Ethyl chloride reacts with sodium cyanide to form propionitrile. Cl is displaced with -CN.
Hydrogenation in presence of Ni reduces cyano group to amino group. Acetylation with acetic anhydride gives the final product Z in which the amino group is acetylated.

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