Which of the following fuels has the lowest calorific value ?
(a) kerosene
(b) CNG
(c) biogas
(d) LPG
Which of the following fuels has the highest calorific value ?
Kerosene, Wood, Hydrogen, Cow-dung cakes, LPG
Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with the highest calorific value first): Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane