Which of the following reduction reactions are actually employed in commercial extraction…
Chemistry · JEE Advanced · NTA Exams — General Principles and Processes of Isolation of Elements
Which of the following reduction reactions are actually employed in commercial extraction of metals?
- Fe2O3 + 2Al → Al2O3 + 2Fe
- Cr2O3 + 2Al → Al2O3 + 2Cr
- 2Na [Au (CN)2]+ Zn → Na2 [Zn (CN)4] + 2Au
- Cu2S + Pb → Cu + PbS↓
Answer
(B) Cr 2 O 3 + 2Al → Al 2 O 3 + 2Cr, (C) 2Na [Au (CN) 2 ]+ Zn → Na 2 [Zn (CN) 4 ] + 2Au
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is (2001)
- Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out (2000)
- Which of the following processes is used in the extractive metallurgy of magnesium?
- In the process of extraction of gold, (2003) Roasted gold ore + CN – + H 2 O O _ 2 [X] + HO [X] + Zn [Y] + Au…
- The cyanide process of gold extraction involves leaching out gold from its ore with CN – in the presence of Q…
- The cyanide process of gold extraction involves leaching out gold from its ore with CN – in the presence of Q…
- The anode mud in the electrolytic refining of silver contains:
- Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood…
More General Principles and Processes of Isolation of Elements questions · Browse all practice questions