Q.

Statement I: In change from PCl3 → PCl5, the hybrid state of Phosphorous remain same.Statement II : d-orbitals are not available for Phosphorous to expand its octet.

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a

Statement I and Statement II are true.

b

Statement I is true and  statement II is false.

c

Statement I is false and Statement II is true.

d

Statement I and Statement II are false.

answer is D.

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Detailed Solution

PCl3 (3 bond pairs + One lone pair) hybridization is sp3PCl5 (5 bond pairs) of 'P' is sp3dI is falsePhosphorous is a 3rd period element , contains vacant d-orbital andThus can expand its OctetII is false.
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