Question

Which pollutant is absent in automobile exhaust?
A. \[ S{{O}}_{{2}}\]
B. Fly ash
C. Hydrocarbon gasses
D. Nitrogen oxide

Answer 1

HINT:
Pollution is the introduction of harmful substances in the environment. Pollutants are those harmful substances that are released in the environment. The factors on which pollutants depend are: chemical structure, concentration, area affected and persistence. There are two types of pollutants: primary and secondary. Primary pollutants are released directly into the atmosphere whereas secondary pollutants are not released directly but by reacting with primary pollutants.

COMPLETE ANSWER:
The automobile exhaust consists of oxides of carbon, sulfur and nitrogen. Fly ash is an air pollutant produced by industries. It is released due to burning of pulverized coal. It is made of fine particles of burnt coal. It is made of aluminum and silica. It also forms particulate matter.
Thus, the correct answer is option B:- fly ash

Additional information:- Air pollutants are released by the automobile emission that causes physical health related problems to the people. It can cause asthma. The potential of lung irritation and inflammation can be reduced that potentially reduces the risk of developing asthma by reducing asthma idling. Air toxins are more harmful to the children and newborns as their lungs are still developing and they breathe more air per pound as compared to adults.

NOTE
Fly ash is used in the cement industry as well for construction purposes as it provides great strength to the concrete. As the pollution is increasing day by day, the threat to the environment is also increasing. Some ways by which these issues can be minimized are recycling, conservation of water and electricity, minimum use of plastic, car pooling. Plastic nearly takes 450 years to degrade.