Question

acidity of normal rain water is due to
a) SO2
b) CO2
c) NO2
d) NO

Answer 1

I would say A.)SO2

Answer 2

"Acid rain is caused by emissions of carbon dioxide, sulfur dioxide and nitrogen oxides which react with the water molecules in the atmosphere to produce acids."
Source: http://en.wikipedia.org/wiki/Acid_rain

Answer 3

it says normal rain

Answer 4

Normal rain isn't suppose to have any acidity (at least to a noticable degree).

Answer 5

From how i interpreted the question is what turns normal rain into acid rain, if that's not the question. Then disregard any answer i've given.

Answer 6

Carbonic acid is fairly weak, however.

Answer 7

SO2 with water forms sulphurous acid - which lends its acidity to the rain water - causing acid rain.