Question

Marble statues often slowly get corroded when kept in open for long time. Assign a suitable example.

Answer 1

example is taj mahal

Answer 2

Explanation:

Taj Mahal is an example of corrosion of marble. The discoloration of its marble is due to corrosion. Air primarily consists of various pollutant gases like carbon dioxide, nitrogen dioxide, Sulphur dioxide etc which mix with moisture in air to form acids such as carbonic acid, nitric acid and sulphuric acid.

This acid comes down as acid rain and causes corrosion of marble statues and monuments. Marble which is composed of calcium carbonate reacts with the different acids which is given as follow:-

CO2 + H2O + CaCO3→ Ca (HCO3)2