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MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

JEE Main levelSingle correct optionDifficulty 2 of 3pn043

In solid $PCl X_{5}$ , which exists as $[PCl X_{4}] X^{+} [PCl X_{6}] X^{-}$ , the hybridisation of phosphorus in the cation and the anion respectively is

A $s p^{3} d$ and $s p^{3} d^{2}$
B $s p^{3}$ and $s p^{3} d$
C $s p^{3}$ and $s p^{3} d^{2}$
D $s p^{3} d^{2}$ and $s p^{3}$

Answer: C

PCl X_{4} X^{+}

has four bond pairs and no lone pair (tetrahedral,

s p^{3}

).

PCl X_{6} X^{-}

has six bond pairs (octahedral,

s p^{3} d^{2}

).

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