Question

The correct order for fuels mentioned below in terms of increasing calorific value will be -
CNG, Petrol, Cow Dung Cake and Wood.

• A. Cow Dung Cake > Petrol > Wood > CNG.
• B. Cow Dung Cake < Petrol < Wood < CNG.
• C. Cow Dung Cake < Wood < Petrol < CNG.
• D. Cow Dung Cake < Wood < CNG < Petrol

Answer 1

The correct option is C

Cow Dung Cake < Wood < Petrol < CNG.

The correct order for fuels in terms of increasing calorific value:

cow dung cake < wood < petrol < CNG

$$\begin{array}{cc}\text{Fuel}& \text{Calorific Value (kJ/kg)}\\ \text{Cow dung cake}& \text{6000-8000}\\ \text{Wood}& \text{17000-22000}\\ \text{Coal}& \text{25000-33000}\\ \text{Petrol, Kerosene, Diesel}& \text{45000}\\ \text{Methane, CNG}& \text{50000}\\ \text{Biogas}& \text{35000-40000}\\ \text{Hydrogen}& \text{150000}\end{array}$$