Question

Assertion (A): The primitive atmosphere was reducing atmosphere, i.e., without free oxygen.

Reason (R): In the primitive atmosphere, oxygen was involved in forming ozone.

विकल्प

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Assertion (A) is true but reason (R) is false.

Explanation:

The primitive atmosphere was reducing and lacked free oxygen. Ozone formed later from oxygen that accumulated after photosynthesis evolved, so the reason is false.