Corrosive sublimate (HgCl_{2}) can be used to | vedclass

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(A) Corrosive sublimate $(HgCl_{2})$ acts as a mild oxidizing agent. It reacts with formic acid $(HCOOH)$ to form a white precipitate of calomel $(Hg_

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formic acid and acetic acid

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(A) Corrosive sublimate $(HgCl_{2})$ acts as a mild oxidizing agent. It reacts with formic acid $(HCOOH)$ to form a white precipitate of calomel $(Hg_{2}Cl_{2})$,which may appear greyish-black due to the presence of finely divided mercury. Acetic acid $(CH_{3}COOH)$ does not react with $HgCl_{2}$.$2 HCOOH + 2 HgCl_{2} \longrightarrow Hg_{2}Cl_{2} + 2 CO_{2} + 2 HCl$$CH_{3}COOH + HgCl_{2} \longrightarrow 	ext{No reaction}$Thus,it is used to distinguish between formic acid and acetic acid.

Corrosive sublimate $(HgCl_{2})$ can be used to distinguish between

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