Question

Assertion : Woolen clothes keep the body warm in winter.
Reason : Air is a bad conductor of heat.

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

Answer 1

Answer: (A)

Woolen fibres enclose a large amount of air in them. Both wool and air are the bad conductors of heat and their coefficient of thermal conductivity is small. Thus they prevent any loss of heat from our body.