Across
- 3. reaction of Ozone with mercury
- 5. gas needed for combustion
- 7. burning of a substance
- 9. addition of oxygen
- 10. ring structure of sulphur
- 11. reaction of Ozone with silver
Down
- 1. alters the rate of reaction
- 2. conversion of one allotropic form to another
- 4. structure of sulphur dioxide
- 6. removal of oxygen
- 8. protects us from UV rays