Across
- 1. lead compounds are ......, which cause several health issues such as lung disease
- 4. sulfur dioxide causes ...... which kills plants and aquatic life, erodes stonework, corrodes metals
- 8. lead compounds are formed from ... petrol
- 9. ..... is used on a global scale, so these problems affect the whole world
- 11. other gas that makes up air, but not noble gases
- 13. in the separation of nitrogen and oxygen, air is first .....
- 15. gas that makes up 78 % of air
- 17. oxides of nitrogen react with other pollutants, in ........, to form a photochemical smog, which causes breathing difficulties
- 18. fuels sulfur dioxide is formed from combustion of ...... which contain sulfur compounds
- 21. oxides of nitrogen is formed from ....
- 22. the temperature is increased until oxygen boils and .... to the top as a gas and is collected
Down
- 2. .....converters are used to remove oxides of nitrogen
- 3. Nitrogen and carbon dioxide are relatively .....gases
- 5. Carbon monoxide + .... -> nitrogen + carbon dioxide
- 6. carbon monoxide is formed from .... combustion of carbon - containing fuels
- 7. what are carbon monoxide, sulfur dioxide, oxides of nitrogen, and lead compounds?
- 10. gas that makes up 21% of air
- 12. fractional distillation column temperature is increased until nitrogen .....and rises to the top as a gas, and collected
- 14. oxygen and nitrogen can be separated from liquid air by .... distillation
- 16. oxygen has a boiling point ....than that of nitrogen
- 19. poisonous carbon monoxide causes .......difficulties, because it reduces the amount of oxygen that red blood cells can carry around the body
- 20. oxides of nitrogen also cause ..... rain