Carbon monoxide occurs in free state in nature.
(1)Carbon monoxide occurs in coal gas,volcanic gases,tobacco fumes,chimney gases and in the exhaust gases of automobiles(in trace amounts).
(2)Mostly carbon monoxide is formed when a large amount of carbon or its compounds is burnt in a limited supply of air or oxygen.
(3)Carbon monoxide does not occur in the free state in nature.
Therefore,the given statement is false.