Choose the correct answer from the options given : The electrolysis of acidified water is an example of :

1. Reduction
2. Oxidation
3. Redox reaction
4. Synthesis

Give a reason for : Conductivity of dilute hydrochloric acid is greater than that of acetic acid.

Select the ion in each case, that would get selectively discharged from the aqueous mixture of the ions listed below:

(i) SO₄^2-, NO₃^- and OH^- ;

(ii) Pb²⁺, Ag⁺ and Cu²⁺.

Name the gas that is produced at the anode during the electrolysis of acidified water.