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Consider the following sequence of reactions: Compound [A] → Reduction → [B] → HNO2 → CH3CH2OH The compound [A] is

1. CH3CH2CN
2. CH3NO2
3. CH3NC
4. CH3CN

Correct answer: CH3CH2CN

Solution

Compound [A] is CH3CH2CN. Upon reduction, it forms CH3CH2CH2NH2 ([B]), which reacts with HNO2 to give CH3CH2OH via diazotization and hydrolysis.

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