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Q.

Statement-I: PCl5 is covalent in gaseous and liquid state but ionic in solid state. 

Statement-2: The solid state of PCl5 consists of tetrahedral cation and octahedral anion.

Choose the correct option:

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a

Statement-I is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-I.

b

Statement-I is True, Statement-2 is True, Statement-2 Is NOT a correct explanation for Statement-I.

c

Statement-I is True, Statement-2 is False.

d

Statement-I is False, Statement-2 is True.

answer is B.

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Detailed Solution

The reaction is,

PCl5(s)PCl4++PCl6

In its solid state, PCl5 is composed of the octahedral PCl6 anion and the tetrahedral PCl4+ cation. In its liquid and gaseous states, PCl5 is a trigonal bipyramidal structure featuring an sp3d hybridized P atom.

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