Question

CO is an acidic oxide.
(A)- True
(B)- False

Answer 1

Hint: The type of the oxide is determined through its nature and chemical properties like its reaction with water, acid or base. As the acidic oxide has a higher oxidation state, it reacts with water to produce acid, and reacts with base to produce salt.

Complete step by step answer:
-For carbon- monoxide to be an acidic oxide, it must be soluble in water to produce an acid. Rather we see the reaction of CO with water to give carbon-dioxide and hydrogen as follows:
$CO+{{H}_{2}}O\to C{{O}_{2}}+{{H}_{2}}$
-Also, an acidic oxide reacts with the base to form salt. Even though the carbon-monoxide reacts with sodium hydroxide base to produce sodium methanoate.
$CO+NaOH\to HCOONa$
-It requires extreme conditions for the reaction to occur like the base to be hot and highly concentrated. Thus, not so feasible. So, the carbon-monoxide is not acidic in nature.
-Also, it doesn’t produce a base on reaction with water. Thus, not a basic oxide. So, now we can say that carbon-monoxide is a neutral oxide in nature as it does not react with an acid or base to produce salt.

Therefore, the statement that CO is an acidic oxide is option (B) False.

Note: The carbon-monoxide is a non-metallic oxide. Also, the carbon present in CO molecules has an oxidation state (+2), which being low makes it a neutral oxide, as the acidic oxides have higher oxidation states. Other examples of neutral oxides are nitrous oxide, ${{N}_{2}}O$ and nitric oxide, NO which are also non-metallic in nature.