Question

In acid rain, nitrogen oxides and sulfur oxides from emissions cause a change in the normal pH level. Which of the following is not true of acid rain?
A) Some of the damaging oxides are produced by natural sources such as volcanoes and forest fires.

B )Most of the damaging oxides are produced from burning fossil fuels.

C) In the atmosphere, the oxides form nitric acid and sulfuric acid.

D) The pH levels of acid rain are very acidic; in the range of 2.0 −3.0.

Answer 1

The pH levels of acid rain are very acidic; in the range of 2.0-3.0, is not true for acid rain.

Answer: D

Explanation

Acid rain is termed for the rain which contains acidic precipitations.

The precipitations of acids are generally made up of sulfuring and nitric acid.

The sulfuric and nitric acids were formed by the chemical reaction occurring between the water, oxygen and other chemicals present in the atmosphere with the sulfur-di-oxide and nitrous oxide emitted in the atmosphere due to burning of natural resources, fossil fuels, etc.

The chemical reaction of these oxides with water, oxygen and other chemicals leads to formation of acids.

Some of the oxides are emitted from burning of natural resources while the major emissions occur from burning of fossil fuels.

Also the oxides react in atmosphere to form acids.

So the options (A),(B) and (C) are true for acid rain.

But the option (D) is not true as the acid rain is not much acidic in nature, as it is getting dissolved in water so the range of acidity is 4.2-4.4 and not 2.0-3.0.