Assertion (A): Carbon monoxide is an extremely poisonous gas.

Reason (R): The gas is formed due to incomplete combustion of carbon.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

How is carbon monoxide gas formed? Give a balanced equation for the reaction.

Write two remedies for carbon monoxide poisoning.

Complete the chemical reactions and balance them.

(a) CuO + CO ⟶

(b) Fe₂O₃ + CO ⟶