Soap is more effective in which water?
Tap?
Rain?
Well?
Handpump?
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1
Tap water
As it does not contain calcium or magnesium salts
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0
tap water is wrong
The answer is B) Rain water ; when can get (almost) pure form of water from the rain water; since Tap , well and Handpump water contains Calcium(Ca²⁺) and Magnesium(Mg²⁺) ions These binds with the soap molecule forming insoluble soap dirt (lime soap) , which results in wastage and decrease in action of soap. literally, Rain water due to absence of Ca and Mg ions is termed Soft water.
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