1.

Assertion :Activating groups are electron donors. Reason: Nitroso group is activating group

Answer»

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

Solution :Like halogens , the nitroso group (-N=O) is ALSO deactivating but o, p-directing. It is deactivating because O is more electronegative than N and hence NO group as whole withdraws ELECTRONS from the benzene ring


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