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

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
Linde process of gas liquefaction employs

Adiabatic expansion against a piston or in a turbine
Exchange of heat with colder stream
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Merely compressing the gas beyond its critical pressure

ANSWER DOWNLOAD EXAMIANS APP