Consider the following statements regarding groundwater pollutants : 1. Most of the groundwater are generally non-alkaline 2. A moderate amount of fluoride about 0.6 mg/I to 1.5 mg/l in drinking water, would help in good development of tech 3. Natural waters do not have dissolved mineral matter in them Which of the above statements is/are correct?

1 only
2 only
3 only
1, 2 and 3

LohaHridoy

5 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 2 : 2 only

Properties of groundwater	Conclusion	Reason	Drinking water standard
Temperature	Generally constant	As the atmospheric temperature does not reach the groundwater, it is effective till surface water.	10°C to 20°C
Colour	Present	It is due to dissolved substances	5 to 20 CU (colour unit)
Turbidity	Low or nil	As groundwater moves at very low velocity, the turbidity produced is less.	5 to 10 TU (turbidty unit)
Alkalinity	Present	As the atmospheric gases such as CO₂ enters the ground through rain water and produces carbonates and bicarbonates responsible for alkalinity.	≤ 200 mg/litre
Chloride	Present	The chloride ions come into solution in water in the underground aquifers, from the geological formation that stores water.	≤ 250 mg/litre
Fluorides	Present	The fluoride ions come into solution in water in the underground aquifers, from the geological formation that stores water.	1 to 1.5 mg/litre
Minerals	Present	Different minerals enter groundwater from the rocks containing different minerals. Example: sodium, calcium, magnesium, chloride, etc.	-

5 views Answered 2022-09-04 04:29

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