Question

Match the following pollutant concentration limits in water with their effects:

• A. Pb \(>50 \) ppb & (IV) Liver damage
• B. \( SO_4^{2-} \) \(>500 \) ppm & (III) Laxative effect
• C. \( NO_3^- \) \(>50 \) ppm & (II) 'Blue baby' syndrome
• D. \( F^- \) \(>2 \) ppm & (I) Brown mottling of teeth \hline \end{tabular} \end{center}

Hint:

Water pollutants cause specific health effects based on toxicity levels. Excess fluoride leads to dental fluorosis, while nitrate contamination affects oxygen transport in infants.

Answer 1

The Correct Option is A

Step 1: Understanding the Effects of Pollutants - Lead (Pb>50 ppb): Liver damage, as lead toxicity affects major organs. - Sulfate (\( SO_4^{2-}>500 \) ppm): Laxative effect, leading to digestive disturbances. - Nitrate (\( NO_3^->50 \) ppm): Causes 'Blue baby' syndrome, where oxygen transport in infants is impaired. - Fluoride (\( F^->2 \) ppm): Leads to brown mottling of teeth (dental fluorosis). Conclusion Thus, the correct answer is: \[ A-IV, B-III, C-II, D-I \]