______________ is an ore of lead?

Related Mcqs:

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

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

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

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

3. ______________ 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

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. Iron ore hematite is concentrated using ____________________?

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

7. 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

8. Chalcopyrite is the main ore of_________________?

   A. Copper
   B. Lead
   C. Tin
   D. Iron

9. Which of the following is not a pyrite ore ?

   A. Celestite
   B. Galena
   C. Gypsum
   D. Siderite

10. Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?

    A. Reduction
    B. Roasting
    C. Calcination
    D. Smelting