Corrosive sublimate ( $H g {C l}_{2}$ ) can be used to distinguish between:

formaldehyde and propanone

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formic acid and acetic acid

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acetaldehyde and butanone

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all of the above

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Solution

The correct option is A formic acid and acetic acid
Option $B$ is the correct answer.
Formic acid gives white precipitate with $H g C l_{2}$ but acitic acid does not react.
$H C O_{2} H + 2 H g C l_{2} ⟶ H g_{2} C l_{2} ↓ white precipitate + 2 H C l + C O_{2} ↑$
$C H_{3} C O O H H g C l_{2} - --- \to No precipitate of H g_{2} C l_{2}$
Formic acid acts as a reducing agent.

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H g {C l}_{2}

Statement 1: Acids and bases can be corrosive in nature.

Statement 2: Acids and bases used in our homes are harmless.

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