Question

Acid rain mainly results from
A) Sulphur dioxide
B) Carbon Dioxide
C) Carbon Monoxide
D) Ammonia

Answer 1

Human activities is the main cause of acid rain. Over the past few decades, humans have released so many different chemicals into the air that they have changed the atmosphere. Power plants also release the majority of sulphur dioxide and much of the sulphur oxides and much of the nitrogen oxides when they burn fossil fuels such as coal, to produce electricity. So, all these types of pollutants cause acid rain.

Step by step answer: Acid rain is caused by chemical reactions that begin when compounds like sulphur dioxide and nitrogen oxides are released in the air.
Option A: Sulfur dioxide: Acid rain is caused by the emission of sulphur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.
Option B: Carbon dioxide: In the atmosphere, carbon dioxide is added by human activities when hydrocarbon fuels like wood, coal, and natural gas release carbon dioxide in the air so, it is not the main cause of acid rain.
Option C: Carbon monoxide: carbon monoxide occurs naturally in the environment. It is released into the atmosphere naturally by volcanic eruptions and forest fires.
Option D:Ammonia: Ammonia is emitted in the atmosphere from a range of non-agricultural sources like petrol cars, landfill sites, sewage works, and many more. They are catalytic converters.
Thus, the answer is option A: Sulfur dioxide.

Note: Acid rain with a pH of fewer than 5.7 results in high levels of atmospheric nitric and sulphuric acids that get washed down to earth. Due to acid rain, soil losses buffering and ecosystems in forests are endangered so acid rain is the major cause of environmental problems.