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Are soft & friable (poor strength and size stability)

Require longer time of carbonisation as ash offers resistance to heat transfer

Produce larger quantity of coke oven gas

None of these

It can not burn low grade coal

It achieves higher fuel combustion efficiency

Less heat transfer surface area is required in boilers

None of these

Semet-Solvay process

Segas process

Onia-Gegi process

Steam reforming of naphtha

5

25

55

80

Fully

Partially

Not at all

Negligibly

Humic coals

Liptobiolites

Sapropelic coals

None of these

CO₂

SO₂

Both A & B

Neither A nor B

Plutonium

Uranium

Radium

Neptunium

Deoxidation

Gasification

Coalification

Carbonisation

100 to 150

350 to 450

550 to 650

700 to 850