Advertisements
Advertisements
प्रश्न
The acids present in acid rain are:
(i) Peroxyacetylnitrate
(ii) H2CO3
(iii) HNO3
(iv) H2SO4
Advertisements
उत्तर
(ii) H2CO3
(iii) HNO3
(iv) H2SO4
Explanation:
Since rainwater has a pH of 5.6 due to the presence of H+ ions formed by the reaction of rainwater with carbon dioxide present in the atmosphere. The reactions can be shown as-
\[\ce{H2O (l) + CO2 (g) -> H2CO3 (aq)}\]
\[\ce{H2CO (aq) -> H+ (aq) + HCO3 (aq)}\]
If the pH of the rainwater falls below 5.6 then it is known as acid rain. SO2 and NO2 after oxidation and reaction with water are major contributors to the acid rain.
\[\ce{2SO2 (g) + O2 (g) + 2H2O (l) -> 2H2SO4 (aq)}\]
\[\ce{4NO2 (g) + O2 (g) + 2H2O (l) -> 4HNO^{-}3 (aq)}\]
APPEARS IN
संबंधित प्रश्न
Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?
List gases which are responsible for greenhouse effect.
Statues and monuments in India are affected by acid rain. How?
What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.
Which of the following gases is not a green house gas?
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 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.
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.
Higher concentration of which gas in the air can cause stiffness of flower buds?
