Question

Why coke is considered a better fuel then coal?

Answer 1

coke is a pure form of carbon and produce very less smoke on burning as compared to coal ... 
                                                          and

coke is tough , porous and black substance ....................
 
hope this helps :)

Answer 2

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√Coke is considered as better fuel than coal because it has higher colorific value than of coal.it also produce less harmful gases