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An organic compound gives red precipitate when heated with Fehling solution. It also undergoes…

Chemistry20241 markShort answer
An organic compound $\text{C}_2\text{H}_4\text{O}$ gives red precipitate when heated with Fehling solution. It also undergoes aldol condensation in the presence of dilute $\text{NaOH}$. What is observed when the compound, referred to in subpart (i), is heated with ammonical silver nitrate?

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When ethanal is heated with ammoniacal silver nitrate (Tollens' reagent), a bright silver mirror is deposited on the walls of the test tube, because $\text{Ag}^+$ is reduced to metallic silver and ethanal is oxidised to ethanoate.
Aldehydes and Ketones

From ISC 2024 Chemistry Paper 1, question 16(iii).