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A student is testing water to know which is best for cleansing purposes with soaps.He would find that the cleansing action of soaps is best when he uses

water obtained from a)rain b)tap c)hand pump d)pond.


I think the answer be (c) hand pump
because soaps gives best cleaning in the soft water.
and the water frm hand pump is pure and soft.
hope it will satisfy you
1 1 1
Option(c)hand pump..................
1 1 1
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