Plumbo-solvency refers to:

1. oxidation of lead to lead oxide

2. oxidation of lead to red lead

3. dissolution of lead in water containing air

4. making lead wires by forcing heated metal through a die

Subtopic:  Properties of Glass, Pb & Sn compounds |
 56%
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Rutile is an ore of:

1. Ti

2. Zr

3. Mn

4. V

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 51%
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Which is not a mineral?

1. Mica

2. Peat

3. Quartz

4. Felspar

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 55%
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Alloy is an example of:

1. gel

2. aerosol

3. solid sol

4. emulsion

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 83%
From NCERT
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The second most common element on the earth is:

1. silicon

2. hydrogen

3. nitrogen

4. oxygen

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 56%
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Nickel is purified by thermal decomposition of its:

1. Hydride

2. Chloride

3. Azide

4. Carbonyl

Subtopic:  Refining Process |
 76%
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In Serpek's process , by product obtained in the purification of bauxite is:

1. Al2O3

2. N2

3. NH3

4. none

Subtopic:  Refining Process |
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Name the metal M which is extracted on the basis of following reactions,

4M+8CN-+2H2O+O24[M(CN)2]-+4OH-

2[M(CN)2]-+Zn[Zn(CN)4]2-+2M

1. nickel

2. silver

3. copper

4. mercury

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
 88%
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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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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