Q.

Which of the following can not be used to extract a metal from its ore?

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a

Displacement with higher reactivity metal

b

Carbon reduction

c

Reaction with  sulphur

d

Electrolytic reduction

answer is C.

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Detailed Solution

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Sulfur reduction is not used for extraction.

Electroreduction is used to extract reactive metals, while carbon reduction and substitution with reactive metals are performed for metals in the middle of the reactive series. 

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Which of the following can not be used to extract a metal from its ore?