The metal used in storage batteries is:

(a) Cu

(b) Sn

(c) Pb

(d) Ni

Subtopic:  Batteries & Salt Bridge |
 81%
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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 |
 75%
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Chloride ore among the following is:

(a) malachite

(b) magnesite

(c) magnetite

(d) Karnalite

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 78%
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Cupellation process is used in the metallurgy of:

(a) copper

(b) silver

(c) lead

(d) iron

Subtopic:  Refining Process |
 51%
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Blood haemoglobin contains:  

(a) Al

(b) Mg

(c) Cu

(d) Fe

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 95%
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Wolframite ore contains:

(a) Zn

(b) W

(c) Hf

(d) Au

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 79%
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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 |
 87%
From NCERT
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Alloy is an example of:

(1) gel

(2) aerosol

(3) solid sol

(4) emulsion

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 89%
From NCERT
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Nickel is purified by thermal decomposition of its:

(1) Hydride

(2) Chloride

(3) Azide

(4) Carbonyl

Subtopic:  Refining Process |
 77%
From NCERT
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4M + 8CN+ 2H2O + O2 4[M(CN)2]+ 4OH-

2[M(CN)2]+ Zn[Zn(CN)4]2- + 2M

The metal M in above-mentioned reaction is:

1. Nickel

2. Silver

3. Copper

4. Mercury

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
 89%
From NCERT
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