WATER

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Across
  1. 2. maintainspH
  2. 3. long glass apparatus used to do titration
  3. 6. water purfification
  4. 9. surface water
  5. 10. eriochromeblackT
  6. 12. endpointcolour
Down
  1. 1. water which doesnot lather with soap
  2. 4. ethylenediaminetetraaceticacid
  3. 5. completion of reaction
  4. 7. identify the completion of reaction by colourchange
  5. 8. calciumoxalate
  6. 11. undergroundwater