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

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

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Chemical Process
Zeolite is a/an

Naturally occuring clay which is capable of exchanging cations
Catalyst used in shift conversion
Abrasive material
None of these

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