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Write the chemical test to distinguish b...

Write the chemical test to distinguish between formic acid and acetic acid.

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Formic acid on warming with Tollen.s reagent forms silver mirror whereas, acetic acid does not.
`undersetunderset("acid")("Formic")(HCOOH)+2[Ag(NH_(3))_(2)]^(+)+2OH^(-)rarrCO_(2)uarrunderset("Mirror")(2Agdarr)+4NH_(3)+2H_(2)O`
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