Q35 / 150 · MHT CET 2024 (11 May Shift 1) · Chemistry

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

  • A
    Monochloromethane
  • B
    Dichloromethane
  • Correct answer
    C
    Trichloromethane
  • D
    Tetrachloromethane

Solution

Refrigerant R-22, also known as chlorodifluoromethane (\(\mathrm{CHClF}_2\)), is commonly produced starting from trichloromethane \(\left(\mathrm{CHCl}_3\right)\), also known as chloroform. In the presence of hydrogen fluoride (HF) and appropriate catalysts, chloroform undergoes partial fluorination to yield R-22.

Hence, the correct answer is option: 'C'.

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