Corundum is:

1. SrO2

2. Al2O3

3. CaCl2

4. Cu2Cl2

 

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Heating of carbonate ores to remove carbon is called as:

1. Roasting

2. Calcination

3. Smelting

4. Fluxing

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Sulphide ores are common for the metals:

1. Ag, Cu and Pb

2. Ag, Cu and Sn

3. Ag, Mg and Pb

4. Al, Cu and Pb

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Which element occurs freely in nature?

1. Iodine

2. Sulphur

3. Phosphorus

4. Magnesium

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Silver obtained by argentiferrous lead is purified by:

1. distillation

2. froth floatation

3. cupellation

4. reacting with KCN

Subtopic:  Refining Process |
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Which process is not used in purification of bauxite?

1. Hall's method

2. Baeyer's method

3. Serpek's method

4. Frankland's method

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
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Chloride ore among the following is:

1. malachite

2. magnesite

3. magnetite

4. Karnalite

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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Chalcogens are: 

1. hydrocarbons 

2. ore forming elements 

3. oxide forming elements

4. those having ability to catenate

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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The following equation represents a method of purification of nickel by,

Ni + 2CO 320KNi(CO)4 420KNi +4CO this method is:

impure                                 pure

1. Cupellation

2. Mond's process

3. Van Arkel method

4. Zone refining

Subtopic:  Refining Process |
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Which pair of elements can form alloy?

1. Zn and Cu

2. Fe and Hg

3. Fe and C

4. C and Pt

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
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