Question

Assertion (R): Fusion of hydrogen nuclei into helium nuclei is the source of energy of all stars.

Reason (R): In fusion heavier nuclei split to form lighter nuclei.

Options

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Answer 1

If assertion is true but reason is false.

Explanation:

In fusion, lighter nuclei combine to form a larger nucleus. Fusion of hydrogen nuclei into helium nuclei is the source of energy of all stars including our sun.