A colourless water-soluble organic liquid dec | vedclass

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(D) The organic liquid is $HCOOH$ (formic acid). $(i)$ It reacts with sodium carbonate $(Na_2CO_3)$ to liberate carbon dioxide $(CO_2)$: $2HCOOH + Na_

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Formic acid

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(D) The organic liquid is $HCOOH$ (formic acid). $(i)$ It reacts with sodium carbonate $(Na_2CO_3)$ to liberate carbon dioxide $(CO_2)$: $2HCOOH + Na_2CO_3 \longrightarrow 2HCOONa + H_2O + CO_2$. $(ii)$ Formic acid acts as a reducing agent and reacts with Tollen's reagent ($Ag_2O$ in $NH_4OH$) to produce a black precipitate of silver $(Ag)$: $HCOOH + Ag_2O \longrightarrow 2Ag + H_2O + CO_2$.

$A$ colourless water-soluble organic liquid decomposes sodium carbonate and liberates carbon dioxide. It produces a black precipitate with Tollen's reagent. The liquid is

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