Fuels and Combustion
Naphthalene recovered from coke oven gas is used

For making electrodes
As moisture proof coating on fibres
As a fuel in furnaces
As moth balls (insecticides)

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Fuels and Combustion
Fixed carbon in coal is defined as

The one which is present in the residue after combustion
That present in volatile matters
The total quantity of carbon present in the coal
Hundred minus the percentage of volatile matter, ash and moisture

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