Question

Assertion : The average life of a radioactive element is infinity.
Reason : As a radioactive element disintegrates, more of it is formed in nature by itself.

• A. If both (A) and (R) are correct, and (R) is the correct explanation of (A).
• B. If both (A) and (R) are correct, and (R) is not the correct explanation of (A).
• C. If (A) is correct, and (R) is incorrect.
• D. If (A) is incorrect, but (R) is correct.
• E. If both (A) and (R) are incorrect.

Answer 1

The correct option is C If (A) is correct, and (R) is incorrect.

If the average life of a radioactive element is infinity, the rate of its decay is negligible. Hence, insignificant amount of it decays. Thus, if assertion is correct, then reason is incorrect.