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Properties of four fuel are given below Fuel Calorific value (J/kg) State Ignition Temp A 17 solid High B 45 liquid moderate C 150 gas low D 20 liquid moderate Which of the following is best option as a fuel for domestic purpose?

Properties of four fuel are given below Fuel Calorific value (J/kg) State Ignition Temp A 17 solid High B 45 liquid moderate C 150 gas low D 20 liquid moderate Which of the following is best option as a fuel for domestic purpose? Correct Answer B

Concept:

  • Calorific value: It is the amount of heat energy present in food or fuel.
  • It is determined by the complete combustion of a specified quantity of fuel at constant pressure and in normal conditions.
  • It is also called calorific power.
  • The unit of calorific value is joule per kilogram i.e. J/Kg.
  • Ignition temperature is the temperature at which fuel catches fire.

Explanation:

  • A good fuel is one that is readily available, cheap, burns at a moderate rate, and produces a large amount of heat.
  • The efficiency of the fuel is measured by its calorific value. 
  • The ignition temperature of fuel should not be high or low. 
  • If it is low it will burn easily, and if it is high it'll be difficult to light it. so The ignition temperature should be moderate.
  • In the given question B and D have moderate ignition temperatures.
  • If the calorific value is high, its efficiency will also be high. If the value is low, its efficiency would also decrease.
  • The efficiency of fuel should be high, so high calorific value.
  • With high calorific value and moderate ignition temperature is the best option as a fuel for domestic purposes.
  • Option 2 is correct.

Additional Information

  •  The calorific value of different fuels is given in the below table.
Fuel Calorific value (kJ/kg)
Methane 50,000
Butane(LPG) 55,000
CNG 50,000
Biogas 35,000-40,000
Hydrogen 1,50,000
Cow dung cake 6,000-8,000
Wood 17,000-22,000
Coal 25,000-33,000
Petrol 45,000

Related Questions

Study the following table: Fuel Calorific value State Ignition temp. A High Solid High B Moderate Gas High C Moderate Gas Moderate D Low Liquid Low Which is best suited as domestic fuel?
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