MHT CET 2025 Chemistry question

Which from the following is the most commonly used refrigerant Feron -12?

(A)Chlorofluoromethane
(B)DichlorodifluoromethaneCorrect
(C)Chlorodifluoromethane
(D)Dichlorofluoromethane

Answer: (B)

Solution

Freon-12 is a chlorofluorocarbon; by the Freon numbering rule (number + 90 gives the digits C, H, F: , i.e. 1 carbon, 0 hydrogen, 2 fluorine) the remaining valencies of carbon are occupied by chlorine, so

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Question ID VK-102971