The speci/species which do not support octet rule are:
(a) $H_{2} O$ (b) $C l_{2} O$ (c) $N O$ (d) $P C l_{5}$

a,b and c

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c and d

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b,c and d

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b, d and a

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Solution

The correct option is B c and d
$N O$ has less than $8$ electrons i.e $6$ electrons violating the octet rule.
$P C l_{5}$ has more than $8$ electrons i.e. $10$ electrons violating the octet rule.

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The speci/species which do not support octet rule are:(a)H2O (b)Cl2O (c)NO (d)PCl5

The correct option is B c and dNO has less than 8 electrons i.e 6 electrons violating the octet rule.PCl5 has more than 8 electrons i.e. 10 electrons violating the octet rule.

The speci/species which do not support octet rule are:
(a) $H_{2} O$ (b) $C l_{2} O$ (c) $N O$ (d) $P C l_{5}$

The correct option is B c and d
$N O$ has less than $8$ electrons i.e $6$ electrons violating the octet rule.
$P C l_{5}$ has more than $8$ electrons i.e. $10$ electrons violating the octet rule.