Physics
Assertion (A): A desert becomes extremely hot in day time and very cold at night.
Reason (R): Sand has high specific heat capacity.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Calorimetry
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Answer
assertion is true but reason is false
Explanation
Assertion (A) is true because deserts experience extreme temperatures because the surface heats up quickly during the day and cools down rapidly at night due to low specific heat capacity of sand, leading to very hot days and very cold nights.
Reason (R) is false because sand has a low specific heat capacity, which means it heats up and cools down quickly. This is why temperature changes in deserts are so extreme.
Hence, assertion is true but reason is false.
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