Give a reason for the following:
In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.

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Solution

In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification because $H N O_{3}$ is volatile.

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For the electrolysis of acidulated water, dilute sulphuric acid $d i l . H_{2} S O_{4}$ is preferred over dilute nitric acid $d i l . H N O_{3}$ for acidification.

Q. Assertion :We can distinguish between solutions of dilute sulphuric acid with dilute HCl and dilute

H N O_{3}

. Reason: With barium chloride solution sulphuric acid will give white precipitate while hydrochloric acid and nitric acid will not give any precipitate

Give reasons for the following :

(a) Electrolysis of molten lead bromide is considered to be a reaction in which oxidation and reduction go side, i.e., a redox reaction.

(b) The blue colour of aqueous copper sulphate fades when it is electrolysed using platinum electrodes.

(d) Aluminium is extracted from its oxide by electrolytic reduction and not by conventional reducing agents.

(e) The ratio hydrogen and oxygen formed at the cathode and anode is 2: 1 by volume.

(f) In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.

(g) Ammonia is unionised in the gaseous state but in the aqueous solution, it is a weak electrolyte.

(h) A graphite anode is preferred to other inert electrodes during electrolysis of fused lead bromide.

(i) For electroplating with silver, silver nitrate is not used as the electrolyte.

(j) Carbon tetrachloride is a liquid but does not conduct an electrolyte.

(k) Potassium is not extracted by electrolysis of its aqueous salt solution.

Give reason for the following :

(a) Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilute sulphuric acid.

(b) Potassium and sodium are not used fro reaction with dilute hydrochloric acid or dilute sulphuric acid in laboratory preparation of hydrogen.

Q. Give a reason for the following:
Potassium and sodium are not used for reaction with dilute hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.

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Give a reason for the following:In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.

In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification because HNO3 is volatile.

Give a reason for the following:
In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.

In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification because $H N O_{3}$ is volatile.