An organic compound X gives a red precipitate | vedclass

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(D) Fehling's solution is a test for aliphatic aldehydes. The compound $X$ that gives a red precipitate with Fehling's solution is acetaldehyde $(CH_3

Vedclass · Accepted Answer

$C_2H_2 + H_2O \xrightarrow[1\% HgSO_4]{40\% H_2SO_4} CH_3CHO$

Vedclass · Answer

(D) Fehling's solution is a test for aliphatic aldehydes. The compound $X$ that gives a red precipitate with Fehling's solution is acetaldehyde $(CH_3CHO)$.The reaction of acetylene $(C_2H_2)$ with water in the presence of $40\% H_2SO_4$ and $1\% HgSO_4$ (Kucherov reaction) yields acetaldehyde $(CH_3CHO)$ as the major product.$C_2H_2 + H_2O \xrightarrow[1\% HgSO_4]{40\% H_2SO_4} CH_3CHO$Acetaldehyde then reacts with Fehling's solution to give a red precipitate of cuprous oxide $(Cu_2O)$.

An organic compound $X$ gives a red precipitate on heating with Fehling's solution. Which one of the following reactions yields $X$ as a major product?

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