An amorphous solid ‘A’ burns in air to form a gas ‘B’ which turns lime water milky. The gas is also produced as a by-product during roasting of sulphide ore. This gas decolourises acidified aq. KMnO_(4) solution. Identify the solid ‘A’ and the gas ‘B’ and write the reaction involved. What happens when SO_(2) is passed through water and reacts withNaOH ? Write balanced equation.

An amorphous solid ‘A’ burns in air to form a gas ‘B’ which tu

1.	An amorphous solid ‘A’ burns in air to form a gas ‘B’ which turns lime water milky. The gas is also produced as a by-product during roasting of sulphide ore. This gas decolourises acidified aq. KMnO_(4) solution. Identify the solid ‘A’ and the gas ‘B’ and write the reaction involved. What happens when SO_(2) is passed through water and reacts withNaOH ? Write balanced equation.
Answer» Solution :`2NaOH+SO_(2)(G)rarrNa_(2)SO_(3)(aq)+H_(2)O` `Na_(2)SO_(3)(aq)+SO_(2)+H_(2)Orarr2NaHSO_(3)(aq)`