1.

Assertion : Formation of PH_(4)^(+) ion is relatively difficult in comparison to NH_(4)^(+) ion. Reason : Lone pair of phosphorus atom in PH_(3) resides in stereochemically inactive pure s-orbital.

Answer»

If ASSERTION is true but the reason is FALSE
If assertion is false but reason is true
If both assertion and reason are true and the reason is the CORRECT EXPLANATION of assertion
If both assertion and reason are true and the reason is not the correct explanation of assertion

Answer :C


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