Combustion And Flames Trivia Quiz For 8th Grade Students

Questions : 15 | Total Attempts: 218 | Recent Updated: 06-May-2022

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Combustion plays a very important role in the day-to-day life of human beings. The chemical process in which a substance reacts with oxygen to give off heat is called combustion. The original substance of the chemical reaction is called fuel and the source of oxygen in the reaction is called oxidizer. There are three types of combustion rapid combustion, spontaneous combustion, and explosion combustion. So take this quiz and know more about combustion and flames.

1. The lowest temperature at which a substance catches fire is called ...

A. Low temperature

B. Minimum temperature

C. Ignition temperatire

D. All of these

2. Which of the following are inflammable substances?

A. LPG

B. Petrol

C. Alcohol

D. All of these

3. Fire extinguisher contains...

A. Nitrogen gas

B. Water vapour

C. Water

D. Carbon dioxide gas

4. Carbon dioxide is heavier than ...

A. Oxygen

B. Nitrogen

C. Both of these

D. None of these

5. Which combustion produces heat,light,sound, and gases also?

A. Rapid combustion

B. Explosion combustion

C. Spontaneous combustion

D. None of these

6. Which zone of the flame is hottest?

A. Outer zone

B. Middle zone

C. Inner zone

D. All of these

7. Which zone of the flame is dark in color?

A. Outer zone

B. Middle zone

C. Inner zone

D. None of these

8. Which zone of the flame is luminous?

A. Outer zone

B. Middle zone

C. Inner zone

D. All of these

9. What is the SI unit of combustion?

A. Joule per g

B. Kilojoule per g

C. Kilojoule per kg

D. None of these

10. Which one of the following is a suffocating and corrosive gas?

A. Carbon dioxide

B. Carbon monoxide

C. Sulphur monoxide

D. Sulphur dioxide

11. Incomplete combustion of the fuel gives...

A. Water vapour

B. Carbon dioxide

C. Carbon monoxide

D. None of these

12. In the sun, heat and light are produced by the ...

A. Nuclear reaction

B. Chemical reaction

C. Displacement reaction

D. All of these

13. What is the calorific value of hydrogen?

A. 100000

B. 150000

C. 200000

D. 250000

14. The calorific value of diesel is ..

A. 50000

B. 55000

C. 40000

D. 45000

15. Which one of the following has a 55000 calorific value?

A. Biogas

B. Wood

C. Coal

D. LPG

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Combustion And Flames Trivia Quiz For 8th Grade Students

Questions Excerpt

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