Question:
Identify the product obtained when ketone reacts with \(\text{NH}_2\)-\(\text{NH}_2\).
Identify the product obtained when ketone reacts with \(\text{NH}_2\)-\(\text{NH}_2\).
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A carbonyl compound plus hydrazine gives a hydrazone.
Updated On: Oct 1, 2026
- Aniline
- Hydrazone
- Phenyl hydrazone
- Anisole
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Ketones react with \(\text{NH}_2\text{-Z}\) type reagents by addition followed by loss of water, forming a \(\text{C=N-Z}\) group.
Step 2: Detailed Explanation:
With \(\text{Z} = \text{NH}_2\) the reagent is hydrazine.
\[ \text{R}_2\text{C=O} + \text{H}_2\text{N-NH}_2 \to \text{R}_2\text{C=N-NH}_2 + \text{H}_2\text{O} \]
The product is a hydrazone.
Step 3: Why the other options are wrong.
Aniline and anisole are not formed from a ketone and hydrazine. A phenylhydrazone needs phenylhydrazine, not plain hydrazine.
Final Answer:
The product is a hydrazone, option (B). \[ \boxed{\text{Hydrazone}} \]
Ketones react with \(\text{NH}_2\text{-Z}\) type reagents by addition followed by loss of water, forming a \(\text{C=N-Z}\) group.
Step 2: Detailed Explanation:
With \(\text{Z} = \text{NH}_2\) the reagent is hydrazine.
\[ \text{R}_2\text{C=O} + \text{H}_2\text{N-NH}_2 \to \text{R}_2\text{C=N-NH}_2 + \text{H}_2\text{O} \]
The product is a hydrazone.
Step 3: Why the other options are wrong.
Aniline and anisole are not formed from a ketone and hydrazine. A phenylhydrazone needs phenylhydrazine, not plain hydrazine.
Final Answer:
The product is a hydrazone, option (B). \[ \boxed{\text{Hydrazone}} \]
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