Which type of coal is used for household purposes
In destructive distillation coal is heated strongly to about
Petroleum and natural gas were formed from
Which of these is not a natural source of energy?
As coal contains mainly carbon, the slow process of conversion of buried vegetation into coal is called
The two places in India famous for their oil wells are
Fuels which are obtained from nature are called
Natural gas mainly contains
Bituminous coal has about per cent carbon.
Which of these is not a fossil fuel?
Fractional distillation of petroleum is done at
Which of these is obtained by destructive distillation of coal?
Ammonical liquor is collected during the destructive distillation of coal in
The process of separating a mixture of two or more liquids having different boiling points by collecting their vapours art controlled temperature is called
The residue left behind when destructive distillation of coal is carried out is