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Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry3 Marks
Question
  1. How does Eutrophication occur?
  2. Write any two adverse effect of lead pollution.
✓

Answer

  1. Nutrients of many fertilizers like phosphates and nitrates are main cause of eutrophication. They usually enter lake through streams. In the presence of these nutrients, the population of algae increases. Since this algae provide food supply, the population of many aquatic animals increases which leads to decrease in dissolved oxygen.
  2.  
  1. It causes inhibition of enzymatic activity.
  2. Lead effects impairment of kidney function and neurological disorder.

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