Question

The life and appearance of the historic monuments like Taj Mahal are likely to be damaged by the presence of:

• A. excess of $S{O}_2$
• B. hydrocarbons
• C. $CFC$
• D. $C{l}_2$

Answer 1

Answer: (A)

$S{O}_2$ is a suffocating and extremely pungent smelling gas. In the presence of metallic oxide or other catalysts, $S{O}_2$ reacts with oxygen of air and water vapour forming sulphuric acid ($H_{2}S{O}_4$) which has corrosive effect on buildings.
The life and appearance of the Taj Mahal has been brought down by the action of excess $S{O}_2$ in the atmosphere.