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Q.

Rain is called acid rain when its pH is below


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a

7

b

6.5

c

6

d

4 to 5 

answer is D.

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Detailed Solution

Concept: Acid rain is a broad term that includes any type of acid element rush, similar as sulfuric acid or nitric acid, which, in wet or dry forms, falls from the atmosphere to the ground. This can be of any type like acidic rain, snow, fog, hail, or indeed dust. Downfall and other types of rush with a pH lower than 6.0 pH are acid rain. The large- scale release of acidic feasts from thermal power shops, manufactories, and vehicles into the atmosphere triggers it. Acid rain is a common term that refers to the deposit of an admixture of acidic factors from wet and dry. Distilled water has a neutral pH of 7 until carbon dioxide is uprooted. Liquids with a pH below 7 are acidic, while liquids with a pH above 7 are alkaline. But generally not lower than 5.7, since carbon dioxide and water in the air reply together to form carbonicpH. They combine with water and oxygen when sulphur dioxide and nitrogen oxides are released into the air and produce sulfuric and nitric acids. also these acids combine with water, performing in acid rain. It becomes acid rain when the pH position of rainwater falls below this range. Thus, the pH of acid rain is roughly 4 to 5.
Hence, option 4 is the correct answer
 
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Rain is called acid rain when its pH is below