Which of the following can be found as pollutants in the drinking water in some parts of India?1. Arsenic2. Sorbitol3. Fluoride4. Formaldehyde5. UraniumSelect the correct answer using the codes given below.
✓ Correct answer: c) 1, 3 and 5 only
ExplanationWater Pollution is the contamination of water bodies, usually as a result of human activities.Heavy metal water pol- lution is the contamination of water with toxic heavy metals, such as lead, mercury, cadmium, arsenic, and chromium etc. Heavy metals can enter the water through natural processes and human activities.Options 1, 3 and 5 are correct: Arsenic, Fluoride, Iron, Ura- nium, Nitrate, are some major groundwater pollutants in India.Option 2 is incorrect: Sorbitol is a sugar alcohol found in fruits and plants with diuretic, laxative and cathartic properties.It is not related with drinking water pollution.Option 4 is incorrect: Formaldehyde is used to preserve fish longer.The use of this chemical is banned in fresh foods by the Food Safety and Standards Authority of India.The International Agency for Research on Cancer (IARC) of WHO classifies formal- dehyde as “carcinogenic to humans”.Formaldehyde is not estab- lished as a drinking water pollutant.Water Quality Criteria according to CPCBDrinking Water Source without conventional treatment but after disinfectionTot
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