p-Block Elements:Crossword Puzzle

12345678910111213141516171819202122
Across
  1. 4. I2O5is used to estimate
  2. 6. glowing in dark
  3. 9. HClO4
  4. 10. Process for manufacturing HNO3
  5. 13. 369 K is the --------temperature of sulphur
  6. 16. supersonic jet planes release
  7. 18. Allotrope of oxygen
  8. 20. Antimony is a -------
  9. 21. S6
  10. 22. ------discovered XePtF6
Down
  1. 1. COCl2
  2. 2. H2S2O7
  3. 3. effect for instability of higher oxdn states down a group
  4. 5. action of alkali on white phosphorus is a ---------reaction
  5. 7. shape of IF7
  6. 8. nature of S2
  7. 11. used as antichlor,disinfectant and preservative
  8. 12. used in Holme's signals
  9. 14. compound formed when excess chlorine reacts with ammonia
  10. 15. Industrial process of preparing chlorine
  11. 17. diluent for oxygen in diving apparatus
  12. 19. air bags release nitrogen from