Refining of petroleum does not involve:

Refining of petroleum is done in :

Name a fraction obtained during refining of petroleum which does not find use as a fuel.

Refining of petroleum involves the process of

Assertion : Refining of petroleum involves fractional distillation. Reason : Fractional distillation involves repeated distillation.

Petroleum refining involves:

Apomixis does not involve in:

Petroleum refining involvs:

Which of the following substances can be used for refining of petroleum and vegetable oils.