Advertisements
Advertisements
Question
Match the pollutants given in Column I with their effects given in Column II.
| Column I | Column II |
| (i) Phosphate fertilisers in water | (a) BOD level of water increases |
| (ii) Methane in air | (b) Acid rain |
| (iii) Synthetic detergents in water | (c) Global warming |
| (iv) Nitrogen oxides in air | (d) Eutrophication |
Advertisements
Solution
| Column I | Column II |
| (i) Phosphate fertilisers in water | (a) BOD level of water increases, (d) Eutrophication |
| (ii) Methane in air | (c) Global warming |
| (iii) Synthetic detergents in water | (a) BOD level of water increases |
| (iv) Nitrogen oxides in air | (b) Acid rain |
Explanation:
(i) Phosphate fertilizers increase growth of algae, increasing BOD level and causing eutrophication.
(ii) Methane oxidises to CO2 which causes global warming.
(iii) Use of synthetic detergents increases BOD level of water.
(iv) Nitrogen oxides present in air combine with water forming nitric acid.
APPEARS IN
RELATED QUESTIONS
Explain tropospheric pollution in 100 words.
List gases which are responsible for greenhouse effect.
Which of the following gases is not a green house gas?
The acids present in acid rain are:
(i) Peroxyacetylnitrate
(ii) H2CO3
(iii) HNO3
(iv) H2SO4
Green house effect leads to global warming. Which substances are responsible for green house effect?
Acid rain is known to contain some acids. Name these acids and where from they come in rain?
Some time ago formation of polar stratospheric clouds was reported over Antarctica. Why were these formed? What happens when such clouds break up by warmth of sunlight?
Match the terms given in Column I with the compounds given in Column II.
| Column I | Column II |
| (i) Acid rain | (a) CHCl2 – CHF2 |
| (ii) Photochemical smog | (b) CO |
| (iii) Combination with haemoglobin | (c) CO2 |
| (iv) Depletion of ozone layer | (d) SO2 |
| (e) Unsaturated hydrocarbons |
Assertion (A): The pH of acid rain is less than 5.6.
Reason (R): Carbon dioxide present in the atmosphere dissolves in rain water and forms carbonic acid.
Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere, even then carbon dioxide is considered to be responsible for greenhouse effect. Explain why?
Explain how does greenhouse effect cause global warming.
Which of the following is a secondary pollutant?
Match List - I with List - II.
| List - I | List - II | ||
|
(a) |
\[\ce{2SO2(g) + O2(g) -> 2SO3(g)}\] | (i) | Acid rain |
| (b) | \[\ce{HOCl(g) ->[hv] \overset{\bullet}{O}H + \overset{\bullet}{C}l}\] | (ii) | Smog |
| (c) | \[\ce{CaCO3 + H2SO4 -> CaSO4 + H2O + CO2}\] | (iii) | Ozone depletion |
| (d) | \[\ce{NO2(g) ->[hv] NO(g) + O(g)}\] | (iv) | Tropospheric pollution |
Choose the correct answer from the options given below.
The gas released during anaerobic degradation of vegetation may lead to ______.
Assertion (A): Ozone is destroyed by CFCs in the upper stratosphere.
Reason (R): Ozone holes increase the amount of UV radiation reaching the earth.
Thermal power plants can lead to ______.
