Question: In Greece and Italy, marble statues were damaged by, A. Smog B. Acid rains C. Eutrophication ...

Question

In Greece and Italy, marble statues were damaged by,
A. Smog
B. Acid rains
C. Eutrophication
D. Leakage of $Cl{ _2}$

Answer 1

Solution

In order to answer this question we must know that marble is an inorganic chemical compound and is chemically known as calcium carbonate, $CaC{O_3}$ . The marble statues get corroded when they are kept in air for a long time. This is because marble reacts with many acidic compounds which are present in air like carbonic acid, sulphuric acid and nitric acid.

Complete step by step answer:
The reaction of $S{O_3}$ with water vapour in the atmosphere results in the production of ${H_2}S{O_4}$ . The ${H_2}S{O_4}$ produced in the atmosphere can combine with water particles in the air for aerosol and comes down as acid rain basically when the atmospheric pollutants like oxides of nitrogen and sulphur reacts with rainwater and comes down with the rain,then this results in the production of Acid Rain.
Acid rain is made up of highly acidic water droplets due to the air emissions, to be more specific the disproportionate levels of sulphur and nitrogen emitted by vehicles and manufacturing processes. It is often called acid rain as this concept contains many types of acidic precipitation.
The acidic deposition can take place in two ways wet as well as dry. Wet deposition is any form of precipitation which removes the acids from the atmosphere and places them on the surface of the earth. In the absence of precipitation, dry deposition of polluting particles and gases can stick to the ground through dust and smoke.

So, the correct answer is Option B.

Note: The $pH$ value of regular rainwater is around $5.7$ , hence it is acidic in nature. The oxides of nitrogen and sulphur are blown away by the wind along with the dust particles. They settle on the earth’s surface after coming down in the form of precipitation. Acid rain is a byproduct of human activities which emit oxides of nitrogen and sulphur in the atmosphere. Examples of some human activities are: burning of fossil fuels, unethical waste emission disposal techniques.