Rain water is considered as acid rain if its | vedclass

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(D) Normal rain water has a $pH$ of about $5.6$ due to the presence of dissolved $CO_2$ which forms weak carbonic acid $(H_2CO_3)$.When the $pH$ of ra

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$5.6$

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(D) Normal rain water has a $pH$ of about $5.6$ due to the presence of dissolved $CO_2$ which forms weak carbonic acid $(H_2CO_3)$.When the $pH$ of rain water drops below $5.6$,it is termed as acid rain.This is primarily caused by the presence of sulfur oxides $(SO_x)$ and nitrogen oxides $(NO_x)$ in the atmosphere,which react with water to form sulfuric acid $(H_2SO_4)$ and nitric acid $(HNO_3)$.

Rain water is considered as acid rain if its $pH$ is less than.......

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