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JEE Advance 2021
Paper-2
Multiple correct answers - Select all that apply
Question
T he correct statement(s) related to the metal extraction processes is(are)
Select ALL correct options:
A
A mixture of PbS and PbO undergoes self-reduction to produce Pb and $\mathrm{SO}_2$.
B
In the extraction process of copper from copper pyrites, silica is added to produce copper silicate.
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 $\mathrm{Na}\left[\mathrm{Au}(\mathrm{CN})_2\right]$.
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
⚠ Partially correct. Some answers are missing.
Solution
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Question Tags
JEE Advance
Chemistry
Easy
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