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Related Topic: Nitrogen and its Compounds

Related Subtopic: Air pollution by nitrogen compounds



Questions 4.6.3(b)

  1. Name one natural source and two artificial sources of nitric acid.
  2. Describe briefly how nitric acid gets to the rivers, lakes, farms and buildings.
  3. Suggest the damaging effects of nitric (V) acid on each of the following (a) farm soil (b) buildings (c) vegetation (d) lakes, air


Answers to Questions 4.6.3(b)


  1. Natural: Lightning causing nitrogen and oxygen to combine. Artificial: Nitric acid manufacturing plant (industry), combustion car engines
  2. Leakage of acid from acid manufacturing industries flowing into rivers, lakes and gardens. Nitrogen (IV) oxide leaking from industry and that formed in the air dissolve in rain water then falls down on buildings, rivers, lakes, farms and buildings.
  3. (a) It makes the soil acidic and causes crop failure. (b) The acid reacts with iron sheets and marble stones thereby dissolving them. (c) The acid damages chlorophyl in plants, causing the vegetation to die, hence deforestation. (d) The acid forms nitrates with minerals in the soil, flows into rivers, encourages growth of aquatic plants such as algea which blocks light and oxygen and causes aquatic animals such as fish to die. Inhaled nitrogen oxides from the hair causes cancer in humans.



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