Questions :-

1. Name the chemical process in which a substance reacts with oxygen to give off heat and light.
(a) Combustion
(b) Flame
(c) Sedimentation
(d) None of these

2. Name the gas which is essential for combustion.
(a) CO2
(b) O2
(c) Cl2
(d) None of these

3. Name the lowest temperature at which a substance catches fire.
(a) Critical temperature
(b) Inflammable temperature
(c) Ignition temperature
(d) None of these

4. Name the substance which is easily burn in air.
(a) Combustible substances
(b) Non – combustible substances
(c) Both
(d) None of these

5. Name the substance which is not burn in air.
(a) Combustible substances
(b) Non – combustible substances
(c) Both
(d) None of these

6. Wood is an example of ___________
(a) Combustible substances
(b) Non – combustible substances
(c) Pure substances
(d) None of these

7. Glass is an example of ___________
(a) Combustible substances
(b) Non – combustible substances
(c) Pure substances
(d) None of these

8. What is the condition for combustion?
(a) Presence of air
(b) Presence of fuel
(c) Ignition temperature of a substance
(d) All of these

9. _____________ is used to extinguish fire.
(a) Oxygen
(b) Hydrogen
(c) Water
(d) None of these

10. Name the combustion in which substances burn rapidly to produce heat and light.
(a) Rapid combustion
(b) Spontaneous combustion
(c) Explosion
(d) None of these