1.

Assertion : Noble gases have highest ionisation enthalpies in their respective periods. Reason : Noble gases have stable closed shell electronic configuration.

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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