water 2

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Across
  1. 3. present in water due to the presence of ferrogenous sand.
  2. 5. Present in water due to plumbosolvency.
  3. 7. Its presence indicates recent pollution by sewage.
Down
  1. 1. present in water due to deterioration of galvanized iron.
  2. 2. Determined by brucine test.
  3. 4. Its presence in water leads to dark stains in laundry
  4. 6. Determined by Nessler reagent