Question

Assertion (A): Carbon monoxide is extremely poisonous in nature.

Reason (R): Carbon monoxide is formed by complete combustion of carbon.

I) Both A and R are true and R is correct explanation of the assertion.
ii) Both A and R are true but R is not the correct explanation of the assertion.
iii) A is true but R is false.
iv) A is false but R is true.​

Answer 1

Carbon monoxide is poisonous because it binds to hemoglobin, blocking oxygen transport, and is formed from the incomplete combustion of carbon, making the assertion true but reason false.

Step-by-step explanation:

The assertion that carbon monoxide is extremely poisonous in nature is true. Carbon monoxide poisoning occurs because it reacts with hemoglobin in the blood, forming a stable complex that prevents oxygen from binding and being carried to the body's organs and tissues. The reason given, however, is false; carbon monoxide is actually formed by the incomplete combustion of carbon. Therefore, the correct answer to the student's question would be option iii) A is true but R is false.