To prevent magnesium from oxidation in electrolytic extraction process, which of the following is done?

Some calcium fluoride is added.

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Some metal chlorides are added.

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Metal is taken out by spoons.

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The whole process is done in an atmosphere of coal gas.

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Solution

The correct option is D The whole process is done in an atmosphere of coal gas.
$C a F_{2}$ is used to lower down the melting point of the mixture and bring conductivity. To prevent magnesium from oxidation in electrolytic extraction process, the whole process is done in an atmosphere of coal gas.

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To prevent magnesium from oxidation in electrolytic extraction process

Name the following:

(a) A metal which is liquid at room temperature.

(b) The process of heating an ore to a high temperature in the presence of air.

(d) A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.

(e) Name an allotrope of a non-metal that allows electricity to pass through it.

In the manufacture of metallic sodium by the fused salt electrolysis (Down's process) a small amount of calcium chloride is added to

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