Fuels and Combustion
Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.

None of these
Hydrogenation
Gasification
Carbonisation

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Fuels and Combustion
Orsat apparatus is meant for

Gravimetric analysis of flue gas
None of these
Finding out combustion efficiency
Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride

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Fuels and Combustion
Presence of free moisture in coal during its high temperature carbonisation

None of these
Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls
Increases the loss of fine coal dust from the ovens when charging
Reduces the coking time

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