Medical Sample papers

General Principle of Extraction of Metal Important Questions

Extraction of Metals

Extraction of Metals from Ores

Question 1
In the metallurgy of zinc, flux is not used because
A
Zinc is volatile hence easily separated
B
Flux is volatile
C
Zinc reacts with flux
D
Zinc ore has no impurities
Question 2
Which is correct?
A
Copper : Malachite
B
Magnesium : Calamine
C
Aluminium : Calamine
D
Zinc : Carnellite
Question 3
The process of ore dressing is carried out to
A
Convert the ore to oxide
B
Remove the poisonous impurities
C
Remove the siliceous materials
D
Add flux to the mineral
Question 4
Which of the following ore is used for industrial extraction of aluminium in India?
A
Keolin
B
Cryolite
C
Bauxite
D
Corundum
Question 5
Sapphire is mineral of
A
Al
B
Mg
C
Cu
D
Zn
Question 6
Bauxite is an oxide ore of
A
Boron
B
Barium
C
Aluminium
D
Bismuth
Question 7
Azurite is an ore of
A
Cu
B
Pt
C
Ag
D
Au
Question 8
Sulphide ores are generally concentrated by
A
By hand picking
B
Gravity separation
C
Froth floatation process
D
Magnetic separation
Question 9
Which of the following metal is not found in free state?
A
Ag
B
Pb
C
Au
D
Na
Question 10
In the froth floatation process for the purification of ores, the ore particles float because
A
They are light
B
Their surface is not easily wetted by water
C
They are insoluble
D
They bear electrostatic charge
Question 11
Of the following substances the one which does not contain oxygen is
A
Dolomite
B
Bauxite
C
Epsom salt
D
Cryolite
Question 12
Difference in density is the basis of

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A
Ultrafiltration
B
Molecular sieving
C
Gravity separation
D
Molecular attraction
Question 13
Which of the following is not an ore of lead?
A
Anglesite
B
Cerrusite
C
Galena
D
Calamine
Question 14
Cryolite is

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A
Magnesium silicate
B
Sodium borofluoride
C
Magnesium silicate
D
Sodium aluminium fluoride
Question 15
Which metal is found in Khetri region of Rajasthan?
A
Lead
B
Iron
C
Copper
D
Gold
Question 16
Main function of roasting is
A
Reduction
B
To remove volatile substances
C
Oxidation
D
Slag formation
Question 17
Which of the following is a carbonate ore?

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A
Malachite
B
Pyrolusite
C
Diaspore
D
Cassiterite
Question 18
Which of the following is not a mineral of iron ?
A
Limonite
B
Siderite
C
Smithsonite
D
Magnetite
Question 19
Naturally occurring substances from which a metal can be profitably (or economically) extracted are called
A
Salts
B
Ores
C
Minerals
D
Gangue
There are 19 questions to complete.
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Vishal Arora

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