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Give the Composition, Causes and Effects of Acid Rain. - Chemistry

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Answer in Brief

Give the composition, causes, and effects of acid rain.

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When oxides of sulphur and nitrogen of air come in contact with water or rain, they form corresponding acids and constitute acid rain.

Causes of acid rain:

The cause of acid rain is the formation of mineral acids such as nitric acid, sulphuric acid, and carbonic acid.

Effects of acid rain:

  • Acid rain removes or leaches away elements in soil such as calcium and potassium, and soil thus loses its fertility. In this way, it damages forests. 
  • It makes water in lakes and rivers acidic and may no longer support aquatic life.
  • Acid rain causes extensive damage to buildings and monuments or marble, limestone, slate, and mortar. These materials become pitted and weakened mechanically. The Taj Mahal is one such example.
    CaCO3 + H2SO4 → CaSO4 + CO2 + H2O
    CaCO3 + 2HNO3 → Ca(NO3)2 + CO2 + H2O
Concept: Causes of Acid Rain
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Selina Concise Science Chemistry 1 Class 9 ICSE
Chapter 8 Atmospheric Pollution
Exercise 8 (D) | Q 11 | Page 137
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