Question

Assertion: Joule and calorie are the units used to express energy.

Reason: 1 calorie = 4.2 joule

Options

• If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

• If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

• If Assertion is true, but the Reason is false.

• If Assertion is false, but the Reason is true.

Answer 1

If Assertion is true, but the Reason is false.

Explanation:

Joule and calorie are both units used to express energy. Therefore, the Assertion (A) is true.

The Reason (R) is taken as false because 11 calorie is exactly about 4.184 joules, not 4.2 joules.

Hence, A is true but R is false.