Question

Aerosols having carbon and fluorine compounds are chiefly released by
A) Refineries
B) Automobiles
C) Industries
D) Jets

Answer 1

Hint:Let us first understand what is meant by aerosol. The suspension of the liquid droplets or minute solid particles in the air or any other gases is called aerosol or aero-solution. They are formed from dust storms, fire, sea spray, volcanic eruption, automobiles and industries exhausts, propellant of jets, burning of fossil fuels etc.

Complete Answer:
Oxides of carbon, nitrogen and sulphur are released by the exhaust of automobiles, industries and refineries. Chlorofluorocarbons and fluorocarbons are the halogenated compounds that are released by the propellants used by jets. They tend to increase the temperature of the lower atmosphere of earth. It results in change in the global climate and also plays a vital role in the depletion of the ozone layer.


Additional information:Depending on the physical properties of aerosol, they either scatter or absorb the sunlight. The bright or translucent aerosol like pure sulphates and nitrates reflect almost all the light back to the space that results in cooling of the atmosphere. Whereas dark aerosols like carbons absorb the light and therefore the temperature increases.

Hence the correct answer is option (D) jets.

Note: Aerosols are of two types;natural and manmade or anthropogenic. Aerosols formed by the refineries, industries and automobiles consists of greenhouse gases such as carbon dioxide, nitrous oxide etc. results in greenhouse effect. In addition to climatic changes, aerosols also cause adverse effects on human health causing asthma, inflammation of respiratory tract, bronchitis and other severe respiratory disorders. Aerosol also has its contribution in acid rain.