Combustion and flame medium

Combustion and Flame Quiz

1. Which of the following gases is produced during combustion?

a) Nitrogen b) Carbon dioxide c) Oxygen d) Helium

2. What is the process of rapid oxidation of a substance accompanied by heat and light?

a) Evaporation b) Combustion c) Sublimation d) Condensation

3. Which of the following substances does not undergo combustion?

a) Wood b) Paper c) Iron d) Petrol

4. What is the colour of the outermost zone of a candle flame?

a) Yellow b) Blue c) Red d) White

5. Which of the following is a non-combustible material?

a) Paper b) Wood c) Coal d) Hydrogen

6. The ignition temperature of a substance is the minimum temperature required for:

a) Evaporation b) Combustion c) Melting d) Boiling

7. What is the colour of the innermost zone of a candle flame?

a) Yellow b) Blue c) Red d) Black

8. What type of fuel is commonly used in automobiles?

a) Hydrogen b) Coal c) Charcoal d) Petrol

9. In a burning candle, which part of the flame is the hottest?

a) Outermost zone b) Middle zone c) Innermost zone d) Entire flame has equal temperature

10. Which gas is responsible for the characteristic blue color of a flame?

a) Carbon dioxide b) Oxygen c) Nitrogen d) Hydrogen