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JEE Main levelSingle correct optionDifficulty 2 of 3ev134

Phosphate-containing builders in detergents are objectionable mainly because they:

  1. Araise the dissolved oxygen above saturation
  2. Bact as nutrients and promote eutrophication of lakes
  3. Ckill all bacteria in the water
  4. Dmake the water strongly acidic

Answer: B

Phosphates are plant nutrients. Discharged into lakes, they cause algal blooms and later oxygen depletion on decay.
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