Fuels and Combustion
A particular coal is said to be free burning when it

Burns completely
Gives smokeless burning
None of these
Shows little or no fusing action

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Fuels and Combustion
Fussain

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

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