Class 8 Science MCQ Chapter 6 Combustion and Flame Solutions in English Medium, Class 8 Science Multiple Choice Question Answer in English to each chapter is provided in the list so that you can easily browse throughout different chapters Class 8 Science MCQ Chapter 6 Combustion and Flame Notes and select need one.
Class 8 Science MCQ Chapter 6 Combustion and Flame
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Combustion and Flame
Chapter – 6
| MCQ |
1. Which zone of a candle flame is least hot?
(a) Outer zone.
(b) Middle zone.
(c) Inner zone.
(d) All zones are equally hot.
Ans: (c) Inner zone.
2. Which fuel is considered the cleanest burning fossil fuel?
(a) Coal.
(b) Diesel.
(c) Natural gas.
(d) Petrol.
Ans: (c) Natural gas.
3. Which device is used to measure the heat produced by combustion?
(a) Thermometer.
(b) Calorimeter.
(c) Hygrometer.
(d) Barometer.
Ans: (b) Calorimeter.
4. Which of the following is a solid fuel?
(a) LPG.
(b) Petrol.
(c) Kerosene.
(d) Charcoal.
Ans: (d) Charcoal.
5. What is the flash point of a substance?
(a) The temperature at which it ignites spontaneously.
(b) The temperature at which it gives off enough vapour to ignite.
(c) The temperature at which it becomes a liquid.
(d) The temperature at which it becomes a gas.
Ans: (b) The temperature at which it gives off enough vapour to ignite.
6. Which of the following is a characteristic of a luminous flame?
(a) Blue in colour.
(b) Yellow in colour.
(c) Produces more heat.
(d) Indicates complete combustion.
Ans: (b) Yellow in colour.
7. What is the main component of biogas?
(a) Methane.
(b) Propane.
(c) Butane.
(d) Ethane.
Ans: (a) Methane.
8. Which substance is used to extinguish fire in oil wells?
(a) Water.
(b) Carbon dioxide.
(c) Mud.
(d) Foam.
Ans: (c) Mud.
9. What is the term for the energy produced by burning a fuel?
(a) Thermal energy.
(b) Chemical energy.
(c) Light energy.
(d) Kinetic energy.
Ans: (a) Thermal energy.
10. Which of the following is a characteristic of a non-luminous flame?
(a) Yellow in colour.
(b) Produces more soot.
(c) Blue in colour.
(d) Indicates incomplete combustion.
Ans: (c) Blue in colour.
11. Which is the most common fire extinguisher used for small fires?
(a) Water extinguisher.
(b) Carbon dioxide extinguisher.
(c) Foam extinguisher.
(d) Powder extinguisher.
Ans: (d) Powder extinguisher.
12. Which of the following is not a necessary condition for combustion?
(a) Fuel.
(b) Heat.
(c) Water.
(d) Oxygen.
Ans: (c) Water.
13. Which type of combustion occurs on its own without external heat?
(a) Spontaneous combustion.
(b) Rapid combustion.
(c) Slow combustion.
(d) None of the above.
Ans: (a) Spontaneous combustion.
14. Which gas is commonly known as the supporter of combustion?
(a) Nitrogen.
(b) Carbon dioxide.
(c) Oxygen.
(d) Hydrogen.
Ans: (c) Oxygen.
15. Which of the following is used as a fire extinguisher for electrical fires?
(a) Water.
(b) Carbon dioxide.
(c) Sand.
(d) Foam.
Ans: (b) Carbon dioxide.
