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Acid formed as a result of lightening re...

Acid formed as a result of lightening reaches the earth's surface through precipitation, thus contributing to the acid rain as well to the growth of plants. Justify.

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During acid rain, the nitric acid formed as a result of lightening process in very dilute form is washed down to earth and reacts with metal carbonates to form nitrates.
`CaCO_3 + 2HNO_3 to Ca(NO_3)_2 + CO_2 + H_2O`.
Nitrates so formed act as excellent nutrients for the growth of plants.
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