A. Reduction
B. Roasting
C. Calcination
D. Smelting
Related Mcqs:
- Which of the following is not a pyrite ore ?
A. Celestite
B. Galena
C. Gypsum
D. Siderite - Ore concentration by froth floatation utilises the ______________ of ore particles ?
A. Density difference
B. Wetting characteristics
C. Terminal velocities
D. None of these - Iron ore hematite is concentrated using ____________________?
A. Electromagnetic separation mainly
B. Gravity separation
C. Froth floatation
D. Roasting - A mineral is termed as ‘ore’, if ____________________?
A. A metal can be economically extracted from it
B. It contains ≥ 40% metal
C. The metal present in it is costly
D. All A , B. and C. - Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is___________________?
A. 0.14
B. 0.34
C. 0.94
D. 1.4 - 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 - _______________ is used as a flux in the smelting of copper ore like chalcopyrite ?
A. Coke breeze
B. Lime powder
C. Silica/quartz
D. Dolomite - Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?
A. Hematite
B. Magnetite
C. Siderite
D. Chalcopyrite - ______________ is an ore concentrating metallurgical process involving a chemical change?
A. Electromagnetic separation
B. Froth floatation
C. Roasting
D. None of these - ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?
A. Bauxite
B. Limestone
C. Quartz
D. Manganese
