MHT CET 2024 Chemistry question

Which from following compounds is used to prepare a refrigerant R-22 ?

(A)Monochloromethane
(B)Dichloromethane
(C)TrichloromethaneCorrect
(D)Tetrachloromethane

Answer: (C)

Solution

Refrigerant R-22 is chlorodifluoromethane, . It is prepared by the Swarts reaction, i.e. fluorination of chloroform with HF in the presence of : \mathrm{CHCl_3 + 2HF \xrightarrow{SbCl_5} CHClF_2 + 2HCl}. So the starting compound is trichloromethane (chloroform), option (C).

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Question ID VK-096839