Pollutants in drinking water (Arsenic, Fluoride, Uranium) — UPSC PYQ 2013

Which of the following can be found as pollutants in the drinking water in some parts of India?

1. Arsenic
2. Sorbitol
3. Fluoride
4. Formaldehyde
5. Uranium

Select the correct answer using the codes given below.

1. 1 and 3 only
2. 2, 4 and 5 only
3. 1, 3 and 5 only
4. 1, 2, 3, 4 and 5

Explanation

Option (c) is correct

• The most straightforward options are Fluoride, Arsenic and Uranium. The knowledge of either “Sorbitol” or “Formaldehyde” will give us the answer.
• We are more familiar with formaldehyde (a carcinogen) since it is a volatile organic compound
• (VOC), an air pollutant. Sorbitol (glucitol) is a sugar alcohol. It contains about one-third fewer calories than sugar and is 60 per cent as sweet. It occurs naturally in berries and fruits.

Answer: (c) 1, 3 and 5 only; Difficulty Level: Medium