CBSE BOARD X, asked by ar0yashkaGavku0shi, 1 year ago

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

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Answered by no2

1

I think (a) as it will contain more no of molecules....

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