Question

1. What is a fuel? Name five characteristics of a good fuel.
2. Define calorific value. Hydrogen has maximum calorific value, yet it is hardly ever used as a fuel. Give reasons.
3. Write a short note on biogas. Why is it called a renewable source of energy? Can the same be said of fossil fuels?
4. Describe the formation of fossil fuels. Why are they called non-renewable sources of energy? 5. What is petroleum refining? Describe the refining process with the help of a neat and labelled diagram of the fractionating. column. 6. With the help of a neat labelled diagram explain the different zones in the candle flame. er. They can be
7. Write a note on reasons and prevention of m have boiling distillation. when a fuel fires at home. What should and should not be done if cooking gas leakage is detected in the house? e distillation of
8. Why is carbon monoxide gas found in motor car exhausts? Write a chemical equation to explain its formation in a car engine using CNG as fuel. ishing a fire and one solid ed when
9. Why is carbon monoxide a poisonous gas? Write a chemical equation to describe an important use of carbon monoxide as a reducing agent.
10. Explain the working of a soda-acid fire extinguisher with the help of a neat labelled diagram.​

Answer 1

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