The correct statement(s) related to the metal extraction processes is(are) (2021)
Chemistry · JEE Advanced · NTA Exams — General Principles and Processes of Isolation of Elements
The correct statement(s) related to the metal extraction processes is(are) (2021)
- 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
(A) A mixture of PbS and PbO undergoes self-reduction to produce Pb and SO 2, (C) Partial oxidation of sulphide ore of copper by roasting, followed by self-reduction produces blister copper, (D) In cyanide process, zinc powder is utilized to precipitate gold from Na[Au(CN) 2 ]
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