Question:
Which of the following reaction doesnât support the acidic nature of alkyne?
Which of the following reaction doesnât support the acidic nature of alkyne?
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Alkynes are weak acids and react with strong bases or nucleophiles, but reactions with electrophiles like HBr do not support their acidic nature.
Updated On: Apr 22, 2026
- Reaction with HBr
- Reaction with Grignard reagent
- Reaction with ammoniacal silver salt
- None of the above
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The Correct Option is A
Solution and Explanation
Step 1: Understand the acidic nature of alkynes.
Alkynes are weakly acidic because the hydrogen attached to the carbon-carbon triple bond can be donated in a reaction. This is typically observed in their reactions with strong bases or nucleophiles.
Step 2: Analyze the reactions.
- Reaction with HBr: Alkynes undergo electrophilic addition reactions with HBr, but this does not indicate an acidic behavior. Alkynes do not typically show strong acidity in this reaction.
- Reaction with Grignard reagent: Alkynes react with Grignard reagents to form alkylated products, which shows their acidic behavior.
- Reaction with ammoniacal silver salt: This is a typical reaction for alkynes, forming silver salts, which further confirms their acidic nature.
Step 3: Conclusion.
The correct answer is (1), reaction with HBr, as it does not support the acidic nature of alkynes.
Alkynes are weakly acidic because the hydrogen attached to the carbon-carbon triple bond can be donated in a reaction. This is typically observed in their reactions with strong bases or nucleophiles.
Step 2: Analyze the reactions.
- Reaction with HBr: Alkynes undergo electrophilic addition reactions with HBr, but this does not indicate an acidic behavior. Alkynes do not typically show strong acidity in this reaction.
- Reaction with Grignard reagent: Alkynes react with Grignard reagents to form alkylated products, which shows their acidic behavior.
- Reaction with ammoniacal silver salt: This is a typical reaction for alkynes, forming silver salts, which further confirms their acidic nature.
Step 3: Conclusion.
The correct answer is (1), reaction with HBr, as it does not support the acidic nature of alkynes.
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