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When acetonitrile (CH3CN) reacts with concentrated hydrochloric acid, it produces acetamide. Which of the following represents the correct transformation?

1. (a) CH3CN converts to CH3CONH2
2. (b) CH3CN changes into CH3CONH2
3. (c) CH3CN transforms into CH3CONH2
4. (d) CH3CN is converted to CH3CONH2

Correct answer: (a) CH3CN converts to CH3CONH2

Solution

Acetonitrile reacts with concentrated HCl via hydrolysis to form acetamide. The reaction involves nucleophilic attack of water on the nitrile group, followed by protonation and rearrangement.

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