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Which of the following ore is/are extrac...

Which of the following ore is/are extracted from its oxide by sir reduction method

A

Cu

B

Hg

C

Al

D

Pb

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
Oxides of unreactive metals like Hg, Pb, Cu are reduced by air. (Self reduction are auto reduction)
`{:(2HgS+3O_(2) to 2HgO+2SO_(2)),(2HgO+HgS to 3HgSO_(2)),(2Cu_(2)S+3O_(2) to 2Cu_(2)O+3SO_(2)),(Cu_(2)S+2Cu_(2)O to 6Cu+SO_(2)),(2Pbs+3O_(2) to 2PbO+3SO_(2)),(2PbO+Pbs to 3Pb+SO_(2)):}`
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