. PH3 exists but PH5 does not exist while


 both PCl3 and PCl5 exist.
Reason- PH3 has sp3 hybridization.
PH3 exist but PH5 does not exist while both PCl3 and PCl5 exist.
A: The Assertion is true, the Reason is true and the Reason is the correct explanation for the Assertion
B: The Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion
C: The Assertion is true, Reason is false.
D: The Assertion is false, Reason is true.
 
 

Best Answer

Explanation-

  1. In PH3 there is no hybridization.
  2. In PH5 there is no d-orbital contraction.
  3. PCl3 and PCl5 both exist as PCl3 and PCl5 both can expand their covalency, so hybridization is possible in both.

Final Answer-

So, The correct option is C. 

PH3 exists but PH5 does not exist while both PCl3 and PCl5 exist.

Reason- PH3 has sp3 hybridization.

PH3 exist but PH5 does not exist while both PCl3 and PCl5 exist.

The Assertion is true, Reason is false.

 

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