1.

Assertion (A) : Ethanal on treatment with dilute alkali and subsequent heatiing gives but-2-enal. Reason (R ) : Aldehydes and ketones having at least one alpha-hydrogen undergo reaction in the presence of dilute alkali to form aldol.

Answer»

Both ASSERTION (A) and Reason(R ) are correct STATEMENTS, and Reason (R ) is the correct EXPLANATION of the Assertion (A).
Both Assertion (A) and Reason(R ) are correct statements, and Reason (R ) is not the correct explanation of the Assertion (A).
Assertion (A) is correct, but Reason (R ) is incorrect STATEMENT.
Assertion (A) is incorrect, but Reason (R ) is correct statement.

ANSWER :A


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