1.

Assertion : Molecular mass of A is M/4 if the molecular mass of B is M. Reason : Vapour density of A four times that of B.

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 but reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If the assertion and reason both are false.

Solution :VAPOUR density of `B=M/2`
Vapour density of `A=M/4xx1/2 =M/8`
Molecular mass of `A=M/4`.


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