Chile saltpetre is the ore of:

1. Mg

2. K

3. Na

4. Ca

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 60%
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Blast furnace is used in the metallurgy of:

1. Al

2. Fe

3. gold

4. Ag

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 82%
From NCERT
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Liquation is used to purify:

1. Pb

2. Sn

3. Bi

4. All

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 60%
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Wolframite ore contains:

1. Zn

2. W

3. Hf

4. Au

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 74%
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The process in which ore is  heated in limited supply of air below its melting point  is known as:

1. Roasting

2. Calcination

3. Reduction

4. Distillation

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 55%
From NCERT
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Iron is made inactive or passive by:

1. H3PO4

2. conc. HNO3

3. conc. H2SO4

4. dil. HNO3

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 56%
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The inner lining of a blast furnace is  made up of:

1. graphite bricks

2. silica  bricks

3. fire clay bricks

4. basic bricks

Subtopic:  Metallurgy of individual elements |
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Froth floatation process for the concentration of ores is a practical application of:

1. adsorption

2. absorption

3. coagulation

4. sedimentation

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 62%
From NCERT
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Roasting is generally carried out in case of :

1. Oxide ores

2. Sulphide ores

3. Silicate ores

4. Carbonate ores

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 84%
From NCERT
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Which substance is used as basic refractory material in furnace?

1. Al2O3

2. SiO2

3. CaO

4. Fe2O3

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