Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion A small drop of mercury is spherical but bigger drops are oval in shape. Reason surface tension of liquid decreases with increase in temperature.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.
Correct Answer: A
Solution :
In a small drop, the force due to surface tension is very large as compared to its weight and hence 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.
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