Which of the following sets has all the species that do not follow octet rule?

C O, P C l_{5}, P C l_{3}, A l C l_{3}

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C O, B_{2} H_{6}, N H_{3}, H_{2} O

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A l C l_{3}, B F_{3}, P C l_{5}, S F_{6}

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H_{2} O, N H_{3}, C O_{2}, A l C l_{3}

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Solution

The correct option is C $A l C l_{3}, B F_{3}, P C l_{5}, S F_{6}$
$B F_{3}, A l C l_{3}$ are electron deficient molecules while in $P C l_{5}$ and $S F_{6}$ molecules $P$ and $S$ possess more than $8$ electrons in their valence shells.

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H_{2} O

C l_{2} O

N O

P C l_{5}

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