Question

Acid rains are produced by
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 1

When acid from the atmosphere is deposited on the earth in several ways then it is known as acid rain. It can be both wet and dry deposition in which the dry deposition refers to the acidic particles that are windblown to the atmosphere and settle down on the earth and wet deposition refers to the water received from acid rain, fog, and snow.

Complete answer:
Let us first study the options to find the correct answer:

Option A: Sulphur dioxide is the major gas that is combusted when sulfur is burnt with coal and nitrogen dioxide is the gas which is composed of nitrogen and oxygen formed with the combustion of fossil fuel and these both gases cause respiratory problems and are the major cause of acid rain. Therefore, this is the correct answer.

Option B: An excess of $NH_3$ by industries and coal gas harms biodiversity and also responsible for respiratory problems but does not cause acid rains. Therefore, this is an incorrect answer.

Option C: Carbon monoxide has harmful effects on the environment as it is a poisonous gas and also causes global warming by affecting other greenhouse gases in the environment. Therefore, this is an incorrect answer.

Option D: Carbon dioxide is a harmful gas for humans as they cannot inhale but is useful for plants as they intake it for their food preparation. Therefore, this is an incorrect answer.

Hence, the correct answer is option (A)

Note: Acid rains have different adverse effects on the human as it causes respiratory ailments and it also affects terrestrial and aquatic vegetation.