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Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
1. Fe
2. Zn
3. Mg
4. Cu
Subtopic: Â Ellingham Diagram |
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NEET - 2018
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Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:
1. Distillation
2. Zone refining
3. Displacement with Zn
4. Liquation
Subtopic: Â Intro - Flux, Leaching, Roasting & Calcination |
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NEET - 2017
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Match items of Column I with the items of Column II and assign the correct code.
| Column I | Column II |
| A) Cyanide process | 1) Ultra pure Ge |
| B) Froth floatation Process |
2) Dressing of ZnS |
| C) Electrolytic | 3) Extraction of Al Reduction |
| D) Zone refining | 4) Extracting of Au |
| A | B | C | D | |
| 1. | 2 | 3 | 1 | 4 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 3 | 4 | 2 | 1 |
| 4. | 4 | 2 | 3 | 1 |
Subtopic: Â Intro - Flux, Leaching, Roasting & Calcination |Â Refining Process |
 81%
Level 1: 80%+
NEET - 2016
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