Available Answers

1. 1.

   Atmospheric pollution refers to the conditions of air made unclean due to introduction of foreign elements from natural & man-made sources to the air thereby causing adverse effects on living organisms on earth. State one natural & one man-made source for each pollutant given below

   Pollutant	Natural source	Man-made source
   1. Sulphur dioxide
   2. Nitrogen dioxide
   3. Carbon dioxide
   4. Methane
   5. Nitrous oxide

    

2. 2.

   State the atmospheric pollutants from the substances given below:

   1. Heavy Metals
   2. Acetic acid
   3. Nitrous acid
   4. Chloroform
   5. Carbontetrachloride
   6. Methane
   7. Phosphates
   8. Alkalies
   9. Drilling fluid
   10. Carbon monoxide
   11. Nitrogen
   12. Nitrogen dioxide
   13. Ozone
   14. Bromofluorocarbons
   15. Water vapour
3. 3.

   Name the following :

   1. Three wet deposite of acid rain.
   2. Two acids other than sulphuric acid & nitric acid present in acid rain.
   3. The gas formed by bacterial decomposition of organic matter which is oxidised to form a pollutant reponsible for acid rain.
4. 4.

   The dry deposits of acid rain contain particles of sulphates & nitrates but not phosphates. Give reasons.

5. 5.

   Burning fossil fuels produces sulphur dioxide the pollutant responsible for acid rain, but not nitrogen dioxide. Give reasons.

6. 6.

   pH of natural rain water differs from the pH of acid rain, even though both contain solutions of acids. Give reasons.