A. C
B. CO
C. CO2
D. H2
Related Mcqs:
- ______________ 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 - Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?
A. Hematite
B. Magnetite
C. Siderite
D. Chalcopyrite - Ore concentration by froth floatation utilises the ______________ of ore particles ?
A. Density difference
B. Wetting characteristics
C. Terminal velocities
D. None of these - 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 - Chalcopyrite is the main ore of_________________?
A. Copper
B. Lead
C. Tin
D. Iron - 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 - ___________________ iron is the purest form of iron?
A. Cast
B. Wrought
C. Pig
D. High silicon - Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is __________________?
A. A slow reaction
B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
C. Still in development stage (by employing fluidised bed technique)
D. All A , B. and C - DDT should not be allowed to come in contact with iron (during its manufacture) to _______________?
A. Avoid its decomposition
B. Prevent sulphonation of the monochlorobenzene by the acid catalyst
C. Achieve non-hygroscopic property
D. None of these
