Environmental Chemistry - Result Question 54

####14. Taj Mahal is being slowly disfigured and discoloured. This is primarily due to

(a) water pollution

(c) global warming

(b) soil pollution

(d) acid rain

(2019 Main, 11 Jan II)

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Answer:

Correct Answer: 14. (a)

Solution:

  1. Acid rain (pH=3.5 - 5.6) constitutes strong acids like HNO3, H2SO4 and H2SO3 which slowly react with marble (CaCO3) of Taj Mahal and make it disfigured and discoloured. Here, CaCO3 (marble) gets dissolved in acids.

CaCO3(s)2H(aq) (Acid rain) Ca2+(aq)+H2O(l)+CO2(g)



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