(A) Formic acid reduces mercuric chloride to mercurous chloride on heating, while acetic
acid does not.
(R): Formic acid is a stronger acid than acetic acid.

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(A) is true but (R) is false

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

answer is B.

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Detailed Solution

As formic acid is converted to carbonic acid, an unstable acid that breaks down into CO₂ and water, formic acid behaves as a reducing agent.

Mercuric chloride has no effect on acetic acid since it lacks reducing capabilities.

Hence, Option B is correct.

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