Smelting is the process of

A Removing the impurities like clay, sand etc. from the iron ore by washing with water
B Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
C Reducing the ore with carbon in the presence of a flux
D All of the above

Correct Answer: Reducing the ore with carbon in the presence of a flux

Smelting is a process of applying heat to ore in order to extract out a base metal.
It is a form of extractive metallurgy.
It is used to extract many metals from their ores, including silver, iron, copper, and other base metals
Bissoy MCQ
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Related Questions

In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :
A Jet of water at high pressure
B Blast of air
C Mixture of water and air
D Rain of molten lead
During smelting process, the combination of fuel in the furnace
A Forms carbon dioxide
B Carbon dioxide with carbon forms carbon mono-oxide
C Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
D All the above
__________ is used as a flux in the smelting of copper ore like chalcopyrite.
A Coke breeze
B Lime powder
C Silica/quartz
D Dolomite
Matte smelting is used in the extraction of
A Lead
B Zinc
C Aluminium
D Copper
Flux addition during smelting of ore is done to
A Remove impurities/gangue
B Enhance rate of reaction
C Accelerate reduction of ore
D Separate slag from metal
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
A 1800
B 2200
C 2400
D 2700
What part of the manufacturing process relate to each stage of the process and to the process as a whole?
A field service
B design
C distribution
D project management
Solvay process as compared to dual process (i.e. modified Solvay process)
A Can use low grade brine
B Has less corrosion problems
C Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
D Both B and C
A television service center can process 8 televisions in 18 minutes. How many televisions can it process in 3 hours at this rate?
A 150
B 45
C 80
D 60
Which of the following is not the state of a process in Process Control Block (PCB) ?
A Old
B New
C Waiting
D Running

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