Combustion & Flame

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Across
  1. 2. When substances vapourise during burning Carbonmonooxide Incomplete combustion produces this gas
  2. 8. Large amount of gas, heat and light produced
  3. 9. Most corrosive gas Inflammable Substances which catch fire at very low temperature
  4. 11. A chemical process in which substance react with oxygen Nonflammable combustible Material which do not combust easily
  5. 12. complete combustion takes place
  6. 14. Amount of energy produced on complete combustion of 1kg of fuel
  7. 17. Most dry powder of chemical is used in fire extinguisher
  8. 18. fuel for the body
  9. 20. Substance that undergoes combustion.
  10. 22. the most common fire extinguisher
  11. 23. lowest temperature at which a substance catch fire
  12. 24. Caused by increased concentration of carbon dioxide
Down
  1. 1. which combust easily.
  2. 3. Oxides of sulphur and nitrogen dissolves in rainwater Sun produce heat and light by nuclear reaction
  3. 4. Material suddenly burst into flames CNG Safe fuel, used in automobiles
  4. 5. Does not produce flame
  5. 6. On the head of the matchstick and burns
  6. 7. Quick burning with lot of heat and light
  7. 10. cheap,large amount of heat and no pollutant produced
  8. 13. Calorific Value of fuel efficiency
  9. 15. Unburnt carbon particles are present
  10. 16. best extinguisher
  11. 19. Required for burning
  12. 21. Used for fire due to electricity or oil