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प्रश्न
Explain the conversion of nitrogen into nitrates during lightning.
उत्तर
During lightning, temperatures often reach as high as 3000°C. At such high temperatures, nitrogen and oxygen present in the air combine to form nitric oxide, which further react with oxygen to form nitrogen dioxide
\[\ce{N2 + O2 ->[electric] 2NO}\]
Oxygen constitutes about 21% of air by volume. It is the active part of air.
\[\ce{2NO + O2 ->[discharge] 2NO2}\]
Nitrogen dioxide then reacts with the water vapour present in air to form nitrous and nitric acids.
\[\ce{2NO2 + H2O -> HNO2 + HNO3}\]
Oxygen constitutes about“21% of air by volume. It is the active part of air.
Nitric acid, so formed, reaches the earth along with rain-water, and reacts with metal carbonates to form metal nitrates.
\[\ce{CaCO3 + 2HNO3 -> CA(NO3)2 + H2O + CO2}\]
Oxygen constitutes about 21% of air by volume. It is the active part of air.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Define the term Global warming.
Classify Carbon monoxide. Also give a balanced equation to prepare it.
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Match the statements in List 1 with the correct answers in List 2
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Water vapour |
| 2 | The component of air which supports combustion | B | Respiration |
| 3 | The inert component in the air slightly soluble in water | C | Rare gases |
| 4 | The component of air which minimizes the rate of evaporation | D | Sulphur dioxide |
| 5 | The process which involves oxidation of food substance in living organisms | E | Helium |
| 6 | The component of air which finds application in observation balloons | F | Carbon dioxide |
| 7 | The process which involves oxidation of substances, liberating heat and light energy | G | Combustion |
| 8 | The component of air which is heavier than air and fairly soluble in water | H | Nitrogen |
| 9 | The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates | I | Photosynthesis |
| 10 | The component of air which is lighter than air and less than 1% in air | J | Oxygen |
_______ can be seen moving in a beam of sunlight in a dark room.
The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
______ is the main component of air.
______ is used as a substitute for compressed air in tyres.
State whether the following statement is true or false. If false, correct them.
Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and airplanes.
