Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

1. Fe

2. Zn

3. Mg

4. Cu

Subtopic:  Ellingham Diagram |
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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:  Intro - Flux, Leaching, Roasting & Calcination |
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Match items of Column I with the items of Column II and assign the correct code.
        Column l                                                                    Column II
A. Cyanide process                                                            1. Ultrapure Ge
B. Froth floatation process                                                 2. Dressing of ZnS
C. Electrolytic reduction                                                      3. Extraction of Al
D. Zone refining                                                                  4. Extraction of Au
                                                                                            5. Purification of Ni
Codes
      A  B  C  D
(a)  2  3  1  5
(b)  1  2  3  4
(c)  3  4  5  1
(d)  4  2  3  1

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Refining Process |
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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:  Intro - Flux, Leaching, Roasting & Calcination | Refining Process |
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NEET MCQ Books for 11th Physics, Chemistry & Biology