An aqueous solution of a gas 'A ' gives the following reactions along with same observations:
When `H_(2)S` is passed through the solution, it becomes turbid. Identify the gas 'A' , and give equation of the reaction involved in each case.

Explanation

These observations suggest that the gas A is sulphur dioxide `(SO_(2))` . The reaction involved are as follows.
`SO_(2)(A) + 2H_(2)S to 3S"(turbidty)" + 2H_(2)O~