Write balanced chemical equations to show –

(i) The oxidizing action of conc. sulphuric acid on carbon.

(ii) The behaviour of H₂SO₄ as an acid when it reacts with magnesium.

(iii) The dehydrating property of conc. sulphuric acid with sugar.

(iv) The conversion of SO₃ to sulphuric acid in the Contact process.

Choose the correct answer from the options given:

The catalyst used in the Contact Process is:

1. Copper
2. Iron
3. Vanadium pentoxide
4. Manganese dioxide

State which property of sulphuric acid is shown by the reaction of concentrated sulphuric acid with:

(i) Ethanol

(ii) Carbon

Write balanced chemical equations for the following reactions:

Action of dilute sulphuric acid on —

(i) Sodium hydroxide

(ii) Zinc sulphide