question_answer44) What are biodegradable and non-biodegradable pollutants?
View Answer play_arrowquestion_answer45) What are sources of dissolved oxygen in water?
View Answer play_arrowquestion_answer46) What is the importance of measuring BOD of water body?
View Answer play_arrowquestion_answer47) Why does water covered with excessive algae growth become polluted?
View Answer play_arrowquestion_answer50) From where does ozone come in the photochemical smog?
View Answer play_arrowquestion_answer51) How is ozone produced in stratosphere?
View Answer play_arrowquestion_answer55) Match the terms given in column I with the compounds given in column II.
Column I | Column II | |
(i) Acid rain | (a) | \[CHC{{l}_{2}}-CH{{F}_{2}}\] |
(ii) Photochemical smog | (b) | CO |
(iii) Combination with haemoglobin | (c) | \[C{{O}_{2}}\] |
(iv) Depletion of ozone layer | (d) | \[S{{O}_{2}}\] |
(e) | unsaturated hydrocarbons |
question_answer56) Match the pollutant(s) in column I with the effect(s) in column II.
Column I | Column II |
(i) Oxides of sulphur | (a) Global warming |
(ii) Nitrogen dioxide | (b) Damage to kidney |
(iii) Carbon dioxide | (c) Blue bay syndrome |
(iv) Nitrate in drinking water | (d) Respiratory diseases |
(v) Lead | (e) Red haze in traffic and congested areas |
Column I | Column II |
(i) Releasing gases to the atmosphere after burning waste material containing sulphur | (a) Water pollution |
(ii) Using carbamates as pesticides corrosion to building material, induce breathing problems | (b) Photochemical smog, damage to plant life, water pollution |
(iii) Using synthetic detergents for washing clothes | (c) Damaging ozone layer |
(iv) Releasing gases produced by automobiles and factories in the atmosphere | (d) May cause nerve diseases in human |
(v) Using chlorofluorocarbon compounds for cleaning computer parts buildings and corrosion | (e) Classical smog, acid rain, water pollution, induce breathing problems, damage to of metals |
question_answer58) 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 |
question_answer68) Explain how does greenhouse effect cause global warming?
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