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JEE MAIN Chemistry QUESTION #5527
Question 1
The Taj Mahal is gradually losing its white colour and being disfigured. This deterioration is primarily attributed to:
  • Global warming
  • Acid rain✔️
  • Water pollution
  • Soil pollution
Correct Answer Explanation
The Taj Mahal, made of white marble (calcium carbonate, $CaCO_3$), is being corroded by acid rain. Sulphur dioxide ($SO_2$) and nitrogen oxides from nearby industries react with rainwater to form sulphuric and nitric acids. These acids react with $CaCO_3$ forming calcium sulphate ($CaSO_4$), causing yellowing and pitting — known as 'Marble Cancer'.