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Standard XII

Chemistry

Electrochemical Principles

Which of the ...

Question

Which of the following processes is used in extractive metallurgy of Magnesium?

Fused salt electrolysis

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Self-reduction

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Aqueous solution electrolysis

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Thermite reduction

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Solution

The correct option is A
Fused salt electrolysis

The reduction potential of Magnesium is lesser than that of water. Hence, aqueous electrolysis is useless - where water is reduced instead.
Only fused salt electrolysis produces magnesium.

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Magnese metal is extracted from manganese dioxide by a reduction process by making use of :
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(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.

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Q. Froth flotation

\to

Roasting

\to

Reduction

\to

Electrolysis
The above processes are used in the extraction of:

Q. Froth flotation

\to

Roasting

\to

Reduction

\to

Electrolysis
The above processes are used in the extraction of:

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Which of the following processes is used in extractive metallurgy of Magnesium?

The correct option is A Fused salt electrolysis The reduction potential of Magnesium is lesser than that of water. Hence, aqueous electrolysis is useless - where water is reduced instead. Only fused salt electrolysis produces magnesium.

The correct option is A
Fused salt electrolysis

The reduction potential of Magnesium is lesser than that of water. Hence, aqueous electrolysis is useless - where water is reduced instead.
Only fused salt electrolysis produces magnesium.