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Question

Oxalic acid may be distinguished from tartaric acid by :

A
NaHCO3
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B
ammoniacal silver nitrate
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C
litmus paper
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D
phenolphthalein
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Solution

The correct option is B ammoniacal silver nitrate
Oxalic acid may be distinguished from tartaric acid by ammoniacal silver nitrate (Tollen's reagent).
This is silver mirror test, used for the detection of aldehydes and ketones.

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