CGPET 2018 Solved Paper

A. HCl

CuCl2

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Cl2 is known as Deacon process. This process is used during the manufacture of alkali's by Leblanc process.
B. Ethene

PdCl2

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CH3CHO,
the above process, is known as Wacker process, which refers to the oxidation of ethene to acetaldehye in the presence of PbCl2.
C. Alcohol

FeSO4

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H2O2

Aldehyde
Fenton reagent is a solution of H2O2 with FeSO4 and is used as catalyst to oxidise alcohols to aldehyde.
D. Alkyne

Ni

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Complex

Benzene, it is the reaction used to convert alkyne into benzene. In this reaction, Ni is used as catalyst along with carbon monoxide (CO), which is used for carboxylation. The reaction is known as Reppe synthesis.
∴ Hence, (a) is the correct option.