______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?

Related Mcqs:

1. 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

2. Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?

   A. Hematite
   B. Magnetite
   C. Siderite
   D. Chalcopyrite

3. Ore concentration by froth floatation utilises the ______________ of ore particles ?

   A. Density difference
   B. Wetting characteristics
   C. Terminal velocities
   D. None of these

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

5. _______________ is used as a flux in the smelting of copper ore like chalcopyrite ?

   A. Coke breeze
   B. Lime powder
   C. Silica/quartz
   D. Dolomite

6. Which of the following is an ore of iron ?

   A. Galena
   B. Chalcopyrite
   C. Hematite
   D. Bauxite

7. Iron ore hematite is concentrated using ____________________?

   A. Electromagnetic separation mainly
   B. Gravity separation
   C. Froth floatation
   D. Roasting

8. ______________ is an ore of lead?

   A. Quartz
   B. Galena
   C. Siderite
   D. Chalcopyrite

9. ______________ is an ore concentrating metallurgical process involving a chemical change?

   A. Electromagnetic separation
   B. Froth floatation
   C. Roasting
   D. None of these

10. ___________________ iron is the purest form of iron?

    A. Cast
    B. Wrought
    C. Pig
    D. High silicon