Question

The correct statement(s) related to the metal extraction processes is (are):

Options

• A mixture of PbS and PbO undergoes self reduction to produce Pb and SO₂.

• In the extraction process of copper from copper pyrites, silica is added to produce copper silicate.

• Partial oxidation of sulphide ore of copper by roasting followed by self reduction produces blister copper.

• In cyanide process, Zinc powder is utilized to precipitate gold from Na[Au(CN)₂].

Answer 1

A mixture of PbS and PbO undergoes self reduction to produce Pb and SO₂, Partial oxidation of sulphide ore of copper by roasting followed by self reduction produces blister copper and In cyanide process, Zinc powder is utilized to precipitate gold from Na[Au(CN)₂].