Chemistry Fill in the blanks Set 09

Chemistry Fill in the blanks Set 09

1. The lowest temperature at which fuel catches fire is called ______
Ans: Ignition Temperature
 
2. _______ is used to extinguish oil fire.
Ans: Foamite
 
3. The amount of heat energy liberated by completely burning 1 kg. of fuel is called ______
Ans: Calorific Value
 
4. In the ________ people used to eat raw food.
Ans: Stone age
 
5. By rubbing two ______ together people could produce fire.
Ans: stones
 
6. Fire is obtained by the _______ combustion of materials.
Ans: Rapid
 
7. The substance that undergoes combustion is called _____
Ans: Fuel
 
8. ________ burns in air producing carbon dioxide, heat and light.
Ans: Coal
 
9. ________ is combustible.
Ans: Match stick
 
10. __________ is necessary for combustion.
Ans: Oxygen