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JEE Advanced levelSingle correct optionDifficulty 3 of 3ph078

The total number of lone pairs (on all atoms, counting the central atom and the three fluorine atoms) in one molecule of $ClF X_{3}$ is

A2
B9
C11
D8

Answer: C

Chlorine carries 2 lone pairs. Each fluorine uses one electron for the bond and carries 3 lone pairs, so the three F atoms carry 9. Total

= 2 + 9 = 11

.

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