Combustion & Flame

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