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MCQ Questions for class 8 Science Combustion and flame

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Below is the Quiz for class 8 Science chapter Combustion and flame. You can Tap on the Start Quiz to begin playing the MCQs.

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Total Questions: 10

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Q1. What is combustion?

  1. Chemical process in which substance reacts with oxygen to give off heat
  2. Chemical process in which no changes takes place
  3. It is a process in which hydrogen gas in released
  4. None of the above
Answer: Chemical process in which substance reacts with oxygen to give off heat

Q2. What is ignition temperature?

  1. The temperature at which substance converts into gas
  2. The minimum temperature at which a substance catches fire
  3. Both A and B
  4. None of the above
Answer: The minimum temperature at which a substance catches fire

Q3. What are inflammable substances?

  1. Substance that do not burn
  2. Substance that do not catches easily
  3. Substance that catches fire easily
  4. All of the above
Answer: Substance that catches fire easily

Q4. What is fire extinguisher?

  1. It helps to put off fire
  2. It helps to stop the spread of diseases
  3. It is used to make flames
  4. All of the above
Answer: It helps to put off fire

Q5. What is rapid combustion?

  1. It is the combustion in which gas burns slowly
  2. It is the combustion in which no heat and light is produced
  3. It is combustion in which gas burns rapidly to produce heat and light
  4. All of the above
Answer: It is combustion in which gas burns rapidly to produce heat and light

Q6. What is spontaneous combustion?

  1. The combustion in which material bursts into flames
  2. The combustion that explodes
  3. The combustion that produces no heat and light
  4. The combustion that burns rapidly
Answer: The combustion in which material bursts into flames

Q7. What is a fuel?

  1. It is readily available
  2. It is cheap and burnt easily
  3. Example wood, petrol and kerosene
  4. All of the above
Answer: All of the above

Q8. What is calorific value?

  1. The energy produced in rapid combustion is called calorific value
  2. It is the amount of carbon dioxide stored in a fire extinguisher
  3. Both A and B
  4. The amount of heat energy produced on complete combustion of 1kg fuel
Answer: The amount of heat energy produced on complete combustion of 1kg fuel

Q9. What is global warming?

  1. The concentration of oxygen is increasing in air is causing global warming
  2. It is caused due to soil erosion
  3. The amount of heat increasing in environment due to increased concentration of carbon dioxide
  4. All of the above
Answer: The amount of heat increasing in environment due to increased concentration of carbon dioxide

Q10. Burning of wood and coal causes _______ of air

  1. Pollution
  2. Smoothness
  3. Cleanliness
  4. All of the above
Answer: Pollution

Q11. A liquid fuel, used in homes is _______

  1. CNG
  2. LPG
  3. Petrol
  4. Diesel
Answer: LPG

Q12. Fire produced by oil cannot be controlled by _______

  1. Fire extinguisher
  2. Soil
  3. Water
  4. All of the above
Answer: Water