Water

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Across
  1. 2. Contour lines for equal rainfall (7)
  2. 5. Intoxication Disease due to over-hydration (5,12)
  3. 9. IUPAC name of water (7)
  4. 10. Largest water reservoir in the universe is in a/an ___ (6)
  5. 12. Most prestigious water award: ___ Water Prize (9)
  6. 15. ___ water is drinkable (7)
  7. 16. Visual phenomenon by ice crystals (4)
  8. 17. Predominant water habitat animals : ___ animals (7)
  9. 18. Water-based musical instrument (9)
  10. 23. Breaking bonds with help of water (10)
  11. 29. A large, smooth wave (5)
  12. 30. Rain Corrosive rain in developed cities (8)
  13. 31. Solid form of water (3)
  14. 32. Popular form of water culvert in Early Rome (8)
  15. 33. Largest ocean (7)
  16. 35. Water Common name of deuterium oxide (5,5)
  17. 37. Planet with polar ice caps (4)
  18. 38. Flat-topped underwater mountain (6)
Down
  1. 1. Ocean with longest mountain range (8)
  2. 3. Centre of a tornado (3)
  3. 4. Youngest ocean (6)
  4. 6. Roman god of sea (7)
  5. 7. Deepest point: ___ Trench (7)
  6. 8. A form of underwater wrestling (9)
  7. 11. Longest river (4)
  8. 13. Any enzyme that helps in hydrolysis (9)
  9. 14. Agglomerated and unstratified glacial debris (7)
  10. 19. Driest place: ___ desert (7)
  11. 20. A type of amphoteric species which includes water (11)
  12. 21. Very heavy rainfall in a short time (10)
  13. 22. Graphical representation of rainfall over time (10)
  14. 24. Underwater volcanic mountain (8)
  15. 25. Potential Difference of ___lightning exceeds 1 billion volts (8)
  16. 26. Deepest Lake (6)
  17. 27. Osmosis Technology for sea-water purification (7,7)
  18. 28. Supercooled water (5)
  19. 34. Doldrums (4)
  20. 35. Water with high mineral content: ___ water (4)
  21. 36. Precipitation which evaporates before hitting ground (5)