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

Options

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

Answer

D

Explanation

We know that molecular weight of substance is calculated by adding the atomic weight of atoms present in one molecule. We also know that molecular weight of oxygen `(O_(2)) = 2x` (Atomic weight of oxygen) ` = 2 xx 16 = 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.