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Fuels and Combustion

Fuels and Combustion
Coke oven gas burns with an yellowish flame, because of the presence of

NH₃
H₂
CO₂
CH₄

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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
Coke oven gas
Tar
Pitch

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Fuels and Combustion
Blast furnace gas constitutes mainly of

N₂ & CH₄
N₂ & H₂
N₂ & CO
CH₄ & CO₂

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Fuels and Combustion
With increase in C/H ratio of a fuel, the dew point of flue gases

Remains same
Increases
Decreases
May increase or decrease ; depends on the type of fuel

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Fuels and Combustion
In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing

CO₂
CO
H₂O
O₂

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Fuels and Combustion
Caking index of coal blend used for blast furnace coke making is about

12
8
36
22

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