Chemical Process
The major use of butadiene is

In the manufacture of synthetic rubber
None of these
As an anti-skinning agent in paint
As a plasticiser for unsaturated polyester

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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

Its calorific value is very less
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

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