Chemical Process
Ultimate analysis of coal determines its __________ content.

Carbon, sulphur, volatile matter & ash
Carbon, ash, sulphur & nitrogen
Carbon, hydrogen, nitrogen & sulphur
Carbon, volatile matter, ash & moisture

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Chemical Process
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
Tar neutralises the residual acids present in pitch
All of these
Its calorific value is very less

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