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Nitric Acid

A colourless ...

Question

A colourless water soluble organic liquid decomposes $N a_{2} C O_{3}$ and liberates $C O_{2}$ . It produces a black precipitate with Tollen’s reagent. The liquid is :

A

acetaldehyde

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B

acetamide

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C

formic acid

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D

acetone

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Solution

The correct option is C formic acid
$2 H C O O H + N a_{2} C O_{3} \to 2 H C O O N a + C O_{2} + H_{2} O H C O O H + A g 2 O \to H_{2} O + C O_{2} + 2 A g ↓$
Tollen's Reagent Black ppt.

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