Advertisements
Advertisements
प्रश्न
Green house effect leads to global warming. Which substances are responsible for green house effect?
उत्तर
The heating of earth due to trapping of radiation is called greenhouse effect. The gases such as CO2, CH4, N2O, CFCl3, CF2Cl2, O3 etc. trap these radiations and are called greenhouse gases.
APPEARS IN
संबंधित प्रश्न
What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.
The acids present in acid rain are:
(i) Peroxyacetylnitrate
(ii) H2CO3
(iii) HNO3
(iv) H2SO4
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 |
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): Carbon dioxide is one of the important greenhouse gases.
Reason (R): It is largely produced by respiratory function of animals and plants.
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?
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.
Assertion (A): Ozone is destroyed by CFCs in the upper stratosphere.
Reason (R): Ozone holes increase the amount of UV radiation reaching the earth.
