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: While measuring the thermal conductivity of liquid experimentally, the upper layer is kept hot and the lower layer is kept cold. Reason: This avoids heating of liquid by convection.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 :
We know that to measure thermal conductivity of liquids experimentally, they must be heated from the top i.e., upper layer is kept hot and lower layer is kept cold, so as to prevent convection in liquids.
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