Fuels and Combustion
Coke oven gas is a better fuel than blast furnace gas, because of its higher

Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
Heat release rate (thus requiring smaller combustion chamber)
Adiabatic flame temperature
All of these

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Fuels and Combustion
Orsat apparatus is meant for

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

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