Acid rains are produced by

Options

A. Excess `NO_2 and SO_2` from burning fossil fuels
B. Excess production of `NH_3` by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of `CO_2` by combustion and animal respiration.

Answer

A

Explanation

When fossil fuel burnt in automobile engines different oxides like NO, `NO_2, SO_2, SO_3` are produced. In the presence of moisture these oxides convert in the acids. These acids comes down from the atmosphere in the form of rain, called acid rain.
S (from fossil fuel) + `O_2 SO_2`
`SO_2+O_3rarrSO_3+O_2`
`SO_2+H_2O_2rarrH_2SO_4`
`SO_3+H_2OrarrH_2SO_4`
`2NO_2+H_2OrarrHNO_3+HNO_2`