Question

Which gas is not present in clean air?
A) Argon
B) Carbondioxide
C) Carbon monoxide
D) Water vapor

Answer 1

Hint: Nowadays air pollution is the main cause for global warming which leads to damaging of our environment. The main causes of air pollution can be Vehicle Exhaust Fumes, Fossil Fuel-Based Power Plants, Exhaust from Industrial Plants and Factories , Construction and Agricultural Activities, Natural Causes, Household Activities

Complete answer:
Air consists of many components out of which $21\% $ is oxygen and $78\% $ nitrogen gas by volume and the remaining percentage comprises other gases such as argon, helium along with traces of carbon dioxide and other products as well.. The air that is produced which leads to air pollution can have long-term health effects from air pollution including heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs. Some scientists suspect air pollutants cause birth defects.
Option A) This is an incorrect option as Argon gas is present in clean air at very low concentration.
Option B) This is an incorrect option as carbon dioxide is present in clean air at a very low percentage.
Option C) This is a correct option as carbon monoxide is not present in clean air.
Option D) This is an incorrect option as water vapor is present in air.

Note:
Effects of air on people be like on the people of color, elderly residents, children with uncontrolled asthma, and people living in poverty. Vulnerable populations may experience more health effects because these populations already have higher rates of heart and lung conditions.