SCIENCE QUIZ for all

9. What do dead bodies of plants and animals when decomposed by micro organisms, liberate?
a) Ammonium Oxide, b) Carbon dioxide, c) Nitrogen oxide, d) None

10. What is the other name Methane?
a) Marsh Gas, b) Methane, c) Methigas, d) Ethinyl gas

11. Who invented Mines Safety Lamp?
a) Michael Faraday, b) Edison, c) Humphrey Davy, d) None

12. What is a Bio Gas?
a) Formed by burning Barium, b) formed by burning Phosphorous,
c) formed by decomposition of plant and animal wastes in the absence of air, d) by burning iron

13. What is a Fossil Fuel?
a) Fuel formed by the slow compression of buried forests,
b) Fuel with LPG, c) Fuel due to burning of cotton wastes, d) None

14. From which word petroleum is derived?
a) Latin, b) Spanish, c) Greek, d) Roman

15. What happens when combustion takes place for a substance?
a) A substance reacts with H2 (Hydrogen),
b) A substance reacts with Co2 (Carbon dioxide)
c) A substance reacts with oxygen to liberate energy in the form of heat and light
d) None

16. Which is not found in the mixture of chemicals in a cracker we use in Deepavali or any festival?
a) Carbon, b) Sulphur, c) Potassium Nitrate, d) Tungsten

17. What is spontaneous combustion?
a) Combustion at very high temperature,
b) Combustion at room temperature,
c) Combustion with igniter,
d) None

18. What is the formation of rust on iron called as?
a) Rapid oxidation, b) slow oxidation, c) spontaneous combustion d) None

19. In which zone of a candle light, the Oxygen from air mixes well the fuel, for bringing about complete combustion?
a) Dark innermost zone, b) Bright Luminous middle zone, c) This zone is the outer zone faintly bluish color. d) None

20. Why does a Goldsmith use a blowpipe and blows air, while working on gold with fire?
a) The air blown aids combustion of un-burnt fuel. b) To remove dirt from gold, c) to prevent mixture of Oxygen (O2), d) none

21. How to put out fire quickly?
a) By pouring oil, b) by cutting off air supply, c) by methane, d) none

22. Which of the following should not be used for putting out fire?
a) Foam, b) Carbon dioxide, c) Blanket, d) Kerosene