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Standard XII

Chemistry

Electrolytic Cell

A solution of...

Question

A solution of ${A g N O}_{3}$ is a good electrolyte but is not used for electroplating an article with silver because :

rapid deposition of silver takes place resulting in uneven coating

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slow deposition of silver takes place resulting in uneven coating

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poor conduction of silver

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none of the above

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Solution

The correct option is A rapid deposition of silver takes place resulting in uneven coating
A solution of $A g N O_{3}$ is a good electrolyte but is not used for electroplating an article with silver because it undergoes very fast redox process and electroplating done through this process is not uniform.

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Similar questions

Q. A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide.
(a) What kind of salt is sodium argentocyanide?
(b) Why is it preferred to silver nitrate as an electrolyte?
(c) State one condition to ensure that the deposit is smooth, firm and long lasting.
(d) Write the reaction taking place at the cathode.
(e) Write the reaction taking place at the anode.

Q. The electrolyte used for electroplating an article with silver is:

Q. (a) A solution of silver nitrate is a good electrolyte but it is not used for electroplating an article with silver.
(b) Identify the following reactions as either oxidation or reduction:
(i) O + 2e⁻

\overset{}{\to}

O²⁻
(ii) K − e⁻

\overset{}{\to}

K⁺
(iii) Fe³⁺ + e⁻

\overset{}{\to}

Fe²⁺

(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.

Q. Give reasons why :
(i) Sodium Chloride will conduct electricity only in fused or aqueous solution state.
(ii) In the electroplating of an article with silver, the electrolyte sodium argento-cyanide solution is preferred over silver nitrate solution.
(iii) Although copper is a good conductor of electricity, it is a non-electrolyte.

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A solution of AgNO3 is a good electrolyte but is not used for electroplating an article with silver because :

The correct option is A rapid deposition of silver takes place resulting in uneven coatingA solution of AgNO3 is a good electrolyte but is not used for electroplating an article with silver because it undergoes very fast redox process and electroplating done through this process is not uniform.

A solution of ${A g N O}_{3}$ is a good electrolyte but is not used for electroplating an article with silver because :