Why normal rain is slightly acidic?

A. Due to the presence of dust in the air
B. Carbon dioxide and water in clouds react to form carbonic acid
C. Ozone depletion
D. All of these
E. None of above

Check Answer

The correct answer is B) Carbon dioxide and water in clouds react to form carbonic acid.

Normal rain is slightly acidic due to the presence of carbon dioxide and water in clouds reacting to form carbonic acid. Carbon dioxide in the air dissolves in the water droplets present in clouds, creating a weak solution of carbonic acid. The acidity of the rain is measured on a pH scale, and normal rain has a pH of around 5.6, which is slightly acidic. This happens because of the presence of CO2 in the atmosphere, which is naturally around us and dissolved into the water droplets that make up clouds, when the droplets become big and heavy they fall as rain which is slightly acidic because of the presence of carbonic acid.

It’s important to note that this acidity level is not harmful to the environment or living organisms, and it varies depending on various factors such as location, and weather conditions. In some areas with high pollution, heavy industrial activity, or nearby sources of pollution, such as volcanic emissions or wildfires, acid rain can be much more acidic and potentially harmful.

An option D. All of these is not a correct answer, as dust in the air and ozone depletion do not cause normal rain to be slightly acidic.
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