Question

Gases such as ‘X’ and ‘Y’ are released in the atmosphere by automobiles and industries. These gases react with ‘Z’ present in the atmosphere and cause acid rain. Identify ‘X’, ‘Y’ and ‘Z’.

• A. $\begin{array}{ccc}\text{X}& \text{Y}& \text{Z}\\ \text{Sulphur dioxide}& \text{Nitrogen dioxide}& \text{Acid}\end{array}$
• B. $\begin{array}{ccc}\text{X}& \text{Y}& \text{Z}\\ \text{Nitrogen dioxide}& \text{Sulphur dioxide}& \text{Acid}\end{array}$
• C. $\begin{array}{ccc}\text{X}& \text{Y}& \text{Z}\\ \text{CFCs}& \text{Carbon monoxide}& \text{water vapours}\end{array}$
• D. $\begin{array}{ccc}\text{X}& \text{Y}& \text{Z}\\ \text{Sulphur dioxide}& \text{Nitrogen dioxide}& \text{water vapours}\end{array}$

Answer 1

The correct option is D $\begin{array}{ccc}\text{X}& \text{Y}& \text{Z}\\ \text{Sulphur dioxide}& \text{Nitrogen dioxide}& \text{water vapours}\end{array}$

Gases such as Sulphur dioxide (X) and Nitrogen dioxide (Y) are released from automobiles and industries and react with the water vapours (Z) present in the atmosphere to form sulphuric acid and nitric acid respectively. These acids then mix with rain water to form acid rain. Acid rain is responsible for discolouration of monuments like Taj Mahal.