Question

Consider the following:
Assertion (A): CO is poisonous to living beings
Reason (R): CO binds to hemoglobin forming carboxyhaemoglobin, which is less stable than oxygen-hemoglobin complex.

• (A) and (R) both are correct and (R) is the correct explanation for (A)
• (A) and (R) both are correct and (R) is not the correct explanation for (A)
• (A) is correct, but (R) is not correct
• (A) is not correct, but (R) is correct

Hint:

Understand the mechanism of CO poisoning via hemoglobin binding.

Answer 1

The Correct Option is C

Step 1: Poisonous nature of CO
CO is poisonous because it binds strongly with hemoglobin forming carboxyhaemoglobin, which is more stable and prevents oxygen transport.
Step 2: Explanation correctness
Reason states complex is less stable, which is incorrect. The complex is more stable, blocking oxygen.
Step 3: Conclusion
Assertion correct, reason incorrect explanation.