1.

Assertion: Na^(+) and Al^(3+) are isoelectronic but ionic radius Al^3+ is less than that of Na6(+) Reason: The magnitude of effective nuclear charge on the outershell electrons in Al^(3+) is greater than that of Na^(+).

Answer»

If both assertion and REASON are TRUE annd the reason is the CORRECT EXPLANATION of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but the reason is false
if assertion is false but the reason is true

Answer :A


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