Chromium - plated steel is a material of popular use. During its process of manufacture, the effluent contains chromate and cyanide ions as impurities. After these are chemically removed, carbon dioxide and salt (sodium chloride) still remain as impurities. This salt solution is purified electrolytically by adding carbonaceous matter which acts as:

a microcell

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an electrode

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a cathode

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a salt absorber

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Solution

The correct option is B a microcell
The above-given salt-solution is purified electrolytically by adding carbonaceous matter which acts as a microcell.

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Similar questions

In the process of purification of copper metal, a thin plate of pure copper and a thick rod of impure copper are used as electrodes, and a metal salt solution is used as an electrolyte :
(a) Which electrode is connected to the positive terminal of the battery ?
(b) Which electrode is connected to the negative terminal of the battery ?
(c) Which metal salt solution is taken as electrolyte ?

Q. In the electrolytic refining of metals, electrolysis of an aqueous solution of its complex salt is done with impure metal as anode and a strip of pure metal as cathode. This method cannot be used for the refining of:

Q. During electrolytic refining of copper.
(a) Pure copper acts as anode.
(b) Pure copper acts as cathode.
(c) Impure copper acts as anode.
(d) Impure copper acts as cathode.

In general, electrolytic refining is a process of purification of impure metal during which an electric current is passed through an electrolytic cell which contains impure metal as anode, a suitable electrolyte and pure metal as cathode.

Q. Electrolytic refining is the method used to refine impure metals. In the process of electrolytic refining, a solution of the metal salt is used as electrolyte.

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The correct option is B a microcellThe above-given salt-solution is purified electrolytically by adding carbonaceous matter which acts as a microcell.

The correct option is B a microcell
The above-given salt-solution is purified electrolytically by adding carbonaceous matter which acts as a microcell.