CGPET 2018 Solved Paper

A. HCl $\overset{\mathrm{CuCl}\rightarrow_2}{\mathrm{Cl}_2}$ is known as Deacon process. This process is used during the manufacture of alkali's by Leblanc process. B. Ethene $\overset{\mathrm{PdCl}\rightarrow_2}{\mathrm{CH_3CHO}}$, the above process, is known as Wacker process, which refers to the oxidation of ethene to acetaldehye in the presence of $\mathrm{PbCl}_2$. C. Alcohol $\xrightarrow[{\mathrm{H_2O_2}}]{\mathrm{FeSO}\rightarrow_4}$ Aldehyde Fenton reagent is a solution of $\mathrm{H_2O_2}$ with $\mathrm{FeSO}_4$ and is used as catalyst to oxidise alcohols to aldehyde. D. Alkyne $\xrightarrow{\text{Complex}} \mathrm{Ni}$ Benzene, it is the reaction used to convert alkyne into benzene. In this reaction, $\mathrm{Ni}$ is used as catalyst along with carbon monoxide (CO), which is used for carboxylation. The reaction is known as Reppe synthesis. $\therefore$ Hence, $(a)$ is the correct option.