Statement I: A small drop of mercury is spherical where bigger drops are oval in shape.
Statement II: Surface tension of liquid decreases with increase in temperature.

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

Answer

A

Explanation

In a small drop, the force due to surface tension is very large as compared to its weight and ehcne it is spherical in shape. A big drop becomes oval in shape due to its large weight. The surface tension of liquid decreases with increase of temperature.