Question

Assertion: SI unit of energy is electron volt.

Reason: I electron volt (eV) = 1.602 × 10⁻¹⁹ J

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 false, but the Reason is true.

Explanation:

The SI unit of energy is joule (J), not electron volt. Therefore, the Assertion (A) is false.

Also,

1 eV = 1.602 × 10⁻¹⁹ J

so the Reason (R) is true.

Hence, A is false but R is true.