How is the calorific value of a fuel expressed?

Correct option is A

Ans. (a)
Sol. The calorific value of a fuel is the amount of energy released when a specific quantity of the fuel is burned completely. It is typically expressed in kilojoules per kilogram (kJ/kg). This unit measures the energy content of the fuel.
Explanation of each option:
· (a) Kilojoules per kg – Correct answer. This is the standard unit used to express the calorific value of a fuel.
· (b) Kilometer per kg – Incorrect, this unit measures distance per mass, which is unrelated to calorific value.
· (c) Kilonewton per kg – Incorrect, this unit measures force per mass, not the energy content of fuel.
· (d) Kilowatt per kg – Incorrect, kilowatts are units of power, not energy content.