Which of the following is not a mineral of aluminium?

1. Bauxite

2. Cryolite

3. Gibsite

4. Malachite

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Serpek’s method involves the heating of bauxite with

1. NaOH

2. Na2CO3

3. N2 +C

4. CaCO3

Subtopic:  Metallurgy of individual elements |
 53%

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In the metallurgy of copper, the slag is

1. FeSiO3

2. CaCO3

3. CaSiO3

4. CaO

Subtopic:  Metallurgy of individual elements |
 72%
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Galena contains ZnS with PbS. Which of the following is used as depressant to stop ZnS to come with foam?

1. NaCN

2. Aniline

3. Pine Oil

4. H2O

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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In Ellingham diagrams of rG oxide formation VsT, which of the following graphs has negative slope?

1. C  CO

2. Fe  Fe2O3

3. Mg  MgO

4. All of the above

Subtopic:  Ellingham Diagram |
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Which of the following is leached with NaCN?

1. Ore of Al

2. Ore of Cu

3. Ore of Ag

4. Ore of Zn

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Vapour phase refining can be carried out in case of

(1) Ni

(2) Zr

(3) Ti

(4) All of the above

Subtopic:  Refining Process |
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In the metallurgy of copper, matte contains

1. Cu2S + Cu2O

2. Cu2S + FeS

3. FeS + FeO

4. Cu2O + FeO

Subtopic:  Metallurgy of individual elements |
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Which of the following metal is purified by distillation process?

1. Zn                            

2. Fe

3. Al

4. Cu

Subtopic:  Refining Process |
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The purest form of iron is-

1. Cast iron

2. Steel

3. Wrought iron

4. Grey cast iron

Subtopic:  Metallurgy of individual elements |
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