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Question

Nucleophilic addition reaction will be most favoured in:

A
CH3 - CH2 - CH2C - CH3
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B
(CH3)2C = O
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C
CH3CH2CHO
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D
CH3CHO
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Solution

The correct option is D CH3CHO
1.Aldehydes are most favoured than ketones for Nucleophilic addition reaction. Because ketones has two +I groups which produces less positive charge on carbonyl carbon
Hence it may be C and D
2. Here comes steric hinderance and large chain, C has large chain more electron releasing and +I effect. So that D is most favored.

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