Question:
What will happen when D-(+)-glucose is treated with methanolic HCl followed by Tollen’s reagent?
What will happen when D-(+)-glucose is treated with methanolic HCl followed by Tollen’s reagent?
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Formation of glycosides blocks the reducing aldehyde group.
Updated On: Mar 20, 2026
- A black ppt. will be formed
- A red ppt. will be formed
- A green colour will appear
- No characteristic colour or ppt. will be formed
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The Correct Option is D
Solution and Explanation
Step 1: Methanolic HCl converts glucose into methyl glucoside (acetal).
Step 2: Acetals are non-reducing.
Step 3: Hence Tollen’s reagent gives no reaction.
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