Fuels and Combustion
The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

CO₂, CO, O₂
CO₂, O₂, CO
CO, O₂, CO₂
O₂, CO₂, CO

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Fuels and Combustion
Anthracite can be used for

Recarbonising steel
All of these
Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
Making carbon electrodes

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