(i) Name the product formed at the anode during the electrolysis of acidified water using platinum electrodes.
(ii) Name the metallic ions that should be present in the electrolyte when an article made of copper is to be electroplated with silver.

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Solution

(i) When acidified water is electrolyzed, oxygen gas is formed at the anode.

(ii) In order to deposit silver on an article, $A g^{+ 1}$ ions must be present in the electrolytic solution.

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Q. The following questions relate to the electroplating of an article with silver.
(a) Name the electrode formed by the article which is to be plated.
(b) What ions must be present in the electrolyte?
(c) What should be the nature of the anode?

Q. During silver plating of an article using potassium argentocyanide as an electrolyte, the anode material should be :

(a) The observation seen when fused lead bromide is electrolysed is :

(i) A silver grey deposit at an anode and a reddish brown deposit at the cathode.

(ii) A silver grey deposit at the cathode and a reddish brown deposit at the anode.

(iii) A silver grey deposit at the cathode and reddish brown fumes at the anode.

(iv) Silver grey fumes at anode reddish brown fumes at the cathode.

(b) During electroplating an article with silver, the electrolyte used is :

(i) Silver nitrate solution

(ii) Silver cyanide solution

(iii) Sodium argentocyanide solution

(iv) Nickel sulphate solution.

(d) State your observation: At the cathode when acidified aqueous copper sulphate solution is electrolysed with copper electrodes.

(e) State which electrode: anode or cathode is the oxidising electrode. Give a reason for the same.

(f) Name the king of particle present in :

(i) Sodium hydroxide soln.

(ii) Carbonic acid

(iii) Sugar soln.

(g) $M_{2} O$ is the oxide of a metal 'M' which is above hydrogen in the activity series. $M_{2} O$ when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity.

(i) State the reaction taking place at the cathode

(ii) Name the product at the anode.

(a) Give reason: The electrolysis of acidulated water is considered to be an example of catalysis.

(b) During the electrolysis of copper [II] sulphate solution using platinum as cathode and carbon as anode

(i) State what you observe at the cathode and at the anode

(ii) State the change noticed in the electrolyte

(iii) Write the reactions at the cathode and at the anode.

Q. Which of the following reaction taken place at anode during electroplating of metal with silver using sodium argentocyanide as an electrolyte?

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(i) Name the product formed at the anode during the electrolysis of acidified water using platinum electrodes.(ii) Name the metallic ions that should be present in the electrolyte when an article made of copper is to be electroplated with silver.

(i) When acidified water is electrolyzed, oxygen gas is formed at the anode.(ii) In order to deposit silver on an article, Ag+1 ions must be present in the electrolytic solution.

(i) Name the product formed at the anode during the electrolysis of acidified water using platinum electrodes.
(ii) Name the metallic ions that should be present in the electrolyte when an article made of copper is to be electroplated with silver.

(i) When acidified water is electrolyzed, oxygen gas is formed at the anode.

(ii) In order to deposit silver on an article, $A g^{+ 1}$ ions must be present in the electrolytic solution.