Fuels and Combustion
Naphthalene is removed from coke oven gas by

Scrubbing with wash oil (a petroleum product)
Adsorbing on bog iron bed
Absorbing in vetro-coke solution
None of these

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Fuels and Combustion
Fussain

Is friable, charcoal like substance
Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation
All of these
Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

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