A. Density difference
B. Wetting characteristics
C. Terminal velocities
D. None of these
Related Mcqs:
- ______________ is an ore of lead?
A. Quartz
B. Galena
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 - At very high concentration of enzymes, the rate of fermentation chemical reaction is _____________ the concentration of reactants?
A. Independent of
B. Directly proportional to
C. Inversely proportional to
D. Proportional to the square of - Which of the following is an ore of iron ?
A. Galena
B. Chalcopyrite
C. Hematite
D. Bauxite - Iron ore hematite is concentrated using ____________________?
A. Electromagnetic separation mainly
B. Gravity separation
C. Froth floatation
D. Roasting - Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
A. C
B. CO
C. CO2
D. H2 - 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. - Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?
A. Hematite
B. Magnetite
C. Siderite
D. Chalcopyrite - Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about ___________________?
A. 0.1 to 0.5
B. 1 to 5
C. 5 to 10
D. 15 to 25
