Write balanced equations for the following: Action of concentrated sulphuric acid on carbon.

Distinguish between the following pairs of compounds using the test given within brackets: Dilute sulphuric acid and dilute hydrochloric acid [using barium chloride solution]

Give one equation each to show the following properties of sulphuric acid:

(i) Dehydrating property

(ii) Acidic nature

(iii) As a non-volatile acid

Identify the acid in each case:

(i) The acid which is used in the preparation of a non­-volatile acid.

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

(iii) The acid on mixing with lead nitrate soln. produces a white ppt. which is insoluble even on heating.