Fuels and Combustion
White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is

Pulverised coke
Pitch
Coke oven gas
Tar

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Fuels and Combustion
Orsat apparatus is meant for

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

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