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Carbon Dioxide

The pH of nor...

Question

The pH of normal rain water is :

A

6.5

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B

4.5

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C

3.5

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D

7.5

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Solution

The correct option is A 6.5
Normal rain water is slightly acidic having pH = 6.5 due to presence of atmospheric $C O_{2}$ which results in the formation of carbonic acid $(H_{2} C O_{3})$

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