First slide

General methods of extraction of elements from the earth crust

Question

In which of the following pairs, the minerals are converting into metals by self reduction?

Moderate

A

$A g_{2} S, Z n S$
B

$C u_{2} S, H g S$
C

$P b S, Z n S$
D

$C u_{2} S, P b S$

Solution

$C u, P b, H g,$ are self reduction metals.

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