Atmospheric Pollution

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Environmental pollution is the effect of undesirable changes in our surroundings that have harmful effects on plants, animals and human beings. It is caused by harmful substances called pollutants tha…

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1. Volcanoes (release CO, SO₂, H₂S, Cl) 2. Decaying vegetation (releases N₂O) 3. Forest fires (release CO) 4. Winds and dust storms (carry particulate matter)…

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Smog is a combination of smoke and fog containing oxides of nitrogen and sulphur, and partially-oxidized hydrocarbons. It is noxious and irritating, reduces visibility, causes respiratory troubles, an…

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2NO + O₂(g) → 2NO₂(g) OR NO(g) + O₃(g) → NO₂(g) + O₂(g)…

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Carbon monoxide combines with haemoglobin more than 200 times more strongly than oxygen, forming carboxyhaemoglobin. This reduces the oxygen-carrying capacity of blood, causing oxygen depletion in hea…

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Acid rain is precipitation (rain, snow, fog, dew) that is more acidic than normal water due to acids like HNO₃ and H₂SO₄. Normal rain pH is 5-6, while acid rain pH ranges from 3-5, sometimes as low as…

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S + O₂ → SO₂ 2SO₂ + O₂ → 2SO₃ SO₃ + H₂O → H₂SO₄ OR 2SO₂ + O₂ + 2H₂O → 2H₂SO₄…

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Acid rain causes extensive damage to building materials like marble and limestone. The reaction is: CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O. This makes the marble pitted and mechanically weak, threatening m…