One of the following metals is obtained by leaching its ore with dilute cyanide solution. Identify it.

Question

One of the following metals is obtained by leaching its ore with dilute cyanide solution. Identify it. (A) Titanium (B) Vanadium (C) Silver (D) Zinc

Tardigrade Admin · Accepted Answer

Silver metal is obtained by Mac-Arthur forest process which is called cyanide process.
The concentrated ore of argentite is treated with dilute

N a CN

solution and a current of

O_{2}

is continuously passed.
Silver sulphide goes into solution in the form of soluble complex sodium argentocyanide.

2 A g_{2} S + 8 N a CN + O_{2} + 2 H_{2} O \to 4 N a [A g (CN)_{2}] + 4 N a O H + 2 S

The soluble complex is treated with zinc dust, when silver gets precipitated.

2 N a [A g (CN)_{2}] + Z n \to N a_{2} [Z n (CN)_{4}] + 2 A g ↓

Q. One of the following metals is obtained by leaching its ore with dilute cyanide solution. Identify it.