MCQ
Taj Mahal marble is affected by :
- ✓$\mathrm{SO}_2$
- B$\mathrm{O}_2$
- C$\mathrm{O}_3$
- D$\mathrm{NO}_2$
✓
Answer
Correct option: A.
$\mathrm{SO}_2$
Sulfur dioxide emitted by factories near the monument and exhaust from trucks and buses are slowly corroding the Taj Mahal's soft marble. $\mathrm{SO}_2$ produces sulfurous and sulfuric acids with water. Sulfuric acid reacts with marble to produce calcium sulphate which is soluble in water hence marble dissolves and erodes.
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