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JEE Main levelSingle correct optionDifficulty 2 of 3hx137

The Freon with the number 113 has the molecular formula

A $C X_{2} HCl X_{2} F X_{3}$
B $C X_{2} Cl X_{2} F X_{4}$
C $C X_{2} Cl X_{3} F X_{3}$
D $CCl X_{3} F$

Answer: C

Add 90:

113 + 90 = 203

. The digits give C = 2, H = 0, F = 3. Saturated two-carbon compound has 6 substituent positions, so

Cl = 6 - 0 - 3 = 3

. Formula

C X_{2} Cl X_{3} F X_{3}

.

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