Extraction of Metals from Ores Quiz:
Ques. Which of the following is not an ore of lead?
(a) Calamine
(b) Anglesite
(c) Galena
(d) Cerrusite
Ques. Sapphire is mineral of
(a) Cu
(b) Zn
(c) Al
(d) Mg
Ques. Azurite is an ore of
(a) Ag
(b) Pt
(c) Au
(d) Cu
Ques. Of the following substances the one which does not contain oxygen is
(a) Bauxite
(b) Epsom salt
(c) Cryolite
(d) Dolomite
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Ques. Naturally occurring substances from which a metal can be profitably (or economically) extracted are called
(a) Minerals
(b) Ores
(c) Gangue
(d) Salts
Ques. 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 bear electrostatic charge
(d) They are insoluble
Ques. The process of ore dressing is carried out to
(a) Remove the siliceous materials
(b) Add flux to the mineral
(c) Convert the ore to oxide
(d) Remove the poisonous impurities
Ques. Difference in density is the basis of
(a) Ultrafiltration
(b) Molecular sieving
(c) Gravity separation
(d) Molecular attraction
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Ques. Cryolite is
(a) Magnesium silicate
(b) Sodium borofluoride
(c) Sodium aluminium fluoride
(d) Magnesium silicate
Ques. Which is correct?
(a) Aluminium : Calamine
(b) Copper : Malachite
(c) Magnesium : Calamine
(d) Zinc : Carnellite
Ques. Which of the following is not a mineral of iron ?
(a) Magnetite
(b) Siderite
(c) Smithsonite
(d) Limonite
Ques. Which of the following metal is not found in free state?
(a) Na
(b) Au
(c) Ag
(d) Pb
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Ques. Which of the following is a carbonate ore?
(a) Pyrolusite
(b) Malachite
(c) Diaspore
(d) Cassiterite
Ques. Which of the following ore is used for industrial extraction of aluminium?
(a) Corundum
(b) Keolin
(c) Cryolite
(d) Bauxite
Ques. In the metallurgy of zinc, flux is not used because
(a) Zinc ore has no impurities
(b) Zinc is volatile hence easily separated
(c) Zinc reacts with flux
(d) Flux is volatile
Ques. Bauxite is an oxide ore of
(a) Barium
(b) Boron
(c) Bismuth
(d) Aluminium
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Ques. Sulphide ores are generally concentrated by
(a) Froth floatation process
(b) Magnetic separation
(c) Gravity separation
(d) By hand picking
Ques. Main function of roasting is
(a) To remove volatile substances
(b) Oxidation
(c) Reduction
(d) Slag formation
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