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प्रश्न
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 |
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उत्तर
| Column I | Column II |
| (i) Acid rain | (c) CO2, (d) SO2 |
| (ii) Photochemical smog | (d) SO2, (e) Unsaturated hydrocarbons |
| (iii) Combination with haemoglobin | (b) CO |
| (iv) Depletion of ozone layer | (a) CHCl2 – CHF2 |
Explanation:
(i) Acid rain is caused due to oxides of carbon, sulphur and nitrogen.
(ii) Photochemical smog is formed by unburnt fuel (unsaturated hydrocarbons).
(iii) Carbon monoxide with haemoglobin is poisonous.
(iv) Chlorofluorocarbons (CHCl2 – CHF2) cause ozone depletion.
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संबंधित प्रश्न
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List gases which are responsible for greenhouse effect.
What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.
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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 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 baby’ syndrome |
| (iv) Nitrate in drinking water | (d) Respiratory diseases |
| (v) Lead | (e) Red haze in traffic and congested areas |
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 |
Assertion (A): Green house effect was observed in houses used to grow plants and these are made of green glass.
Reason (R): Green house name has been given because glass houses are made of green glass.
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.
Explain how does greenhouse effect cause global warming.
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.
Assertion (A): Ozone is destroyed by CFCs in the upper stratosphere.
Reason (R): Ozone holes increase the amount of UV radiation reaching the earth.
