The salt formed when concentrated sulphuric acid reacts with KNO₃ above 200°C:

1. K₂SO₄
2. K₂SO₃
3. KHSO₄
4. KHSO₃

The property exhibited by concentrated sulphuric acid when it is used to prepare hydrogen chloride gas from potassium chloride:

1. Dehydrating property
2. Drying property
3. Oxidizing property
4. Non-volatile acid property

The acid which does not form acid salt by a basic radical:

1. H₂CO₃
2. H₃PO₄
3. H₂SO₄
4. CH₃COOH

The general formula of hydrocarbons with single covalent bonds is:

1. C_nH_2n+2
2. C_nH_2n
3. C_nH_2n-2
4. C_nH_2n-6