50 ml of water sample requires 6 ml of s...

50 ml of water sample requires 6 ml of soap solution to produce a good lather. 1 ml of soap solution is equal to 0.001 g of `CaCO_3` . Then the degree of hardness of water is

120 ppm

1.2 ppm

112 ppm

2.4 ppm

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AAKASH SERIES-HYDROGEN AND ITS COMPOUNDS-OBJECTIVE EXERCISE - 3

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