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NEET Chemistry Biomolecules / जैव-अणु Question Bank Self Evaluation Test - Biomolecules

  • question_answer
    What will happen when D-(+)-glucose is treated with methanolic \[-HCl\] followed by Tollens' reagent?

    A) A black ppt. will be formed

    B) A red ppt. will be formed

    C) A green colour will appear

    D) No characteristic colour or ppt. will be formed.

    Correct Answer: D

    Solution :

    [d] Reaction of D-(+)-glucose with methanolic \[HCl\] leads to formation of methyl glucoside (\[{{C}_{1}}-OH\] group is methylated) which, being acetal, is not hydrolysable by base, so it will not respond Tollen's reagent.


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