State your observations when:

(i) Barium chloride soln. is mixed with sodium sulphate soln.

(ii) Concentrated sulphuric acid is added to sugar crystals.

A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated.

A: Typical acid property

B: Non-volatile acid

C: Oxidizing agent

D: Dehydrating agent

Choose the property [A, B, C or D] depending on which is relevant to each of the following:

(i) Preparation of hydrogen chloride gas.

(ii) Preparation of copper sulphate from copper oxide.

(iii) Action of conc. sulphuric acid on sulphur.

State one relevant observation for – Action of conc. sulphuric acid on hydrated copper sulphate.

State – How will you distinguish between dilute hydrochloric acid and dilute sulphuric acid using lead nitrate solution.