Chemical Process
High acid value of an oil or fat is an indication of

None of these
Storage under improper conditions
Its smaller molecular weight
Absence of unsaturation

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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

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

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