Class 7 Exam > Class 7 Questions > Acid rain is created when substances like ___...
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Acid rain is created when substances like ___________ mix with raindrops in the air.
- a)Oxygen, Carbon dioxide
- b)Sulphur dioxide, Nitrogen dioxide
- c)Hydrogen, Sulphur dioxide
- d)Nitrogen dioxide, Hydrogen
Correct answer is option 'B'. Can you explain this answer?
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Acid rain is created when substances like ___________ mix with raindro...
Acid rain is created when substances like sulphur dioxide, and nitrogen dioxide mix with raindrops in the air. These substances make the rain harmful and can damage buildings, plants, and animals.
Topic in NCERT: Acid Rain
Line in NCERT: "the rain becomes acidic because carbon dioxide, sulphur dioxide and nitrogen dioxide (which are released into the air as pollutants) dissolve in rain drops to form carbonic acid, sulphuric acid and nitric acid respectively."
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Acid rain is created when substances like ___________ mix with raindro...
Understanding Acid Rain
Acid rain is a significant environmental issue resulting from human activities and natural processes. It occurs when certain pollutants mix with rainwater, leading to harmful effects on ecosystems, buildings, and human health.
Key Pollutants
The primary substances responsible for acid rain are:
Formation of Acid Rain
When sulphur dioxide and nitrogen dioxide mix with raindrops in the atmosphere, the following reactions occur:
These acids dissolve in the rainwater, resulting in acid rain, which has a lower pH than normal rainwater.
Effects of Acid Rain
Acid rain can lead to various detrimental effects, including:
In summary, option 'B' is correct as sulphur dioxide and nitrogen dioxide are the key substances that contribute to the formation of acid rain, making it a pressing environmental concern.
Acid rain is a significant environmental issue resulting from human activities and natural processes. It occurs when certain pollutants mix with rainwater, leading to harmful effects on ecosystems, buildings, and human health.
Key Pollutants
The primary substances responsible for acid rain are:
- Sulphur Dioxide (SO2): This gas is released from burning fossil fuels, such as coal and oil, and from industrial processes. When it enters the atmosphere, it can combine with oxygen and water vapor to form sulfuric acid.
- Nitrogen Dioxide (NO2): This pollutant comes from vehicle emissions and power plants. It reacts with water vapor in the air to produce nitric acid.
Formation of Acid Rain
When sulphur dioxide and nitrogen dioxide mix with raindrops in the atmosphere, the following reactions occur:
- Formation of Sulfuric Acid: SO2 reacts with oxygen and water to form H2SO4 (sulfuric acid).
- Formation of Nitric Acid: NO2 reacts with water to form HNO3 (nitric acid).
These acids dissolve in the rainwater, resulting in acid rain, which has a lower pH than normal rainwater.
Effects of Acid Rain
Acid rain can lead to various detrimental effects, including:
- Damage to forests and vegetation.
- Acidification of lakes and rivers, harming aquatic life.
- Corrosion of buildings and monuments, especially those made of limestone and marble.
- Negative impacts on soil chemistry, affecting agriculture.
In summary, option 'B' is correct as sulphur dioxide and nitrogen dioxide are the key substances that contribute to the formation of acid rain, making it a pressing environmental concern.
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