Assertion (A): Concentrated sulphuric acid is kept in air tight bottles.

Reason (R): Air contains impurities, therefore H₂SO₄ will get spoiled.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Sulphuric acid acts as an oxidising agent.

Reason (R): Sulphuric acid produces hydrogen on reacting with zinc.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Name :

(a) The acid formed when sulphur dioxide dissolves in water.

(b) The gas released when sodium carbonate is added to a solution of sulphur dioxide.

(c) Liquid E can be dehydrated to produce ethene.

(d) The gas that can be oxidized to sulphur.

(e) The solution which liberates sulphur dioxide gas from sodium sulphite.

(f) The gas produced on reaction of dilute sulphuric acid with a metallic sulphide.

(g) A dilute mineral acid which forms a white precipitate when treated with barium chloride solution.

(h) The acid which produces sugar charcoal from sugar.

(i) The acid on mixing with lead nitrate solution produces white ppt. which is insoluble even on heating.

What is the name given to the salts of:

(a) Sulphurous acid

(b) Sulphuric acid