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NEET levelSingle correct optionDifficulty 1 of 3hx187

The refrigerant Freon-12 (CFC-12) has the formula

A $CCl X_{2} F X_{2}$
B $CHClF X_{2}$
C $CClF X_{3}$
D $CCl X_{3} F$

Answer: A

Add 90 to 12: 102, so C = 1, H = 0, F = 2. Four bonds to carbon remain, so Cl = 4 - 2 = 2, giving

CCl X_{2} F X_{2}

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