Assertion: Molecular weight of oxygen is 16.
Reason: Atomic weight of oxygen is 16.

Options

A. (a)If both assertion and reason are true and the reason is the true explanation of the assertion.
B. (b)If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. (c )If the assertion is true but reason is false.
D. (d)If assertion is false but reason is true.

Answer

d

Explanation

We know that molecular weight of substance is calculated by adding the atomic weight of atoms present in one molecules. We also know that molecular weight of oxygen `(O_(2))=2x` (Atomic weight of oxygen) `=2xx16=32 a.m.u.` Atomic weight of oxygen is 16, because it is 16 times heavier than `1//12^(th)` of carbon atom. Therefore assertion is false but reason is true.