EDUCATION UGC NET
ENVIRONMENTAL STUDIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Less than 1.7
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Less than 2.7
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Less than 4.7
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Less than 5.7
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Detailed explanation-1: -Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides-produced from power plants and automobiles-the rain becomes much more acidic. Typical acid rain has a pH value of 4.0.
Detailed explanation-2: -Acid rain is a term referring to precipitation (rain, snow, sleet, fog, cloudwater, dew etc.) mixed with acidic components. Water has a neutral pH of 7. Liquids with a pH less than 7 are acidic, and those with a pH greater than 7 are alkaline.
Detailed explanation-3: -Acid rain is caused by the release of sulfur dioxide and nitrogen oxides into the atmosphere, where they react with water, oxygen, and other chemicals to become sulfuric and nitric acid respectively. The pH of acid-impacted rain is generally below 4.5 on the pH scale.
Detailed explanation-4: -Rain water with a pH less than 5.6 is called Acid rain.