Passing hydrogen sulphide in H₂SO₄ precipitates

Name of oxide of sulphur which reacts with H₂SO₄ to give H₂S₂O₇ is

Concentrated H₂SO₄ is used in the laboratory preparation of nitric acid and hydrochloric acid because it is

The production of H₂SO₄ is a solution

The catalyst used for the preparation of sulphuric acid in contact process is

An organic acid which on dehydration releases both CO and CO₂ gas is

Corrosive action of H₂SO₄ on skin is due to its

H₂SO₄ is a

Pungent fumes of HCl gas is produced when con H₂SO₄ is treated with

Oleum (H₂S₂O₇) when diluted by water it gives