1.

Which of the statements given below is/are correct ? Permanent hardness of water is due to the presence of soluble. 1. chloride of calcium 2. bicarbonate of calcium 3. sulphate of magnesium 4. bicarbonate of magnesium Select the correct answer using the codes give below

Answer»

1 only
1 and 3
2 and 4
1 , 2 and 3

Solution :CHLORIDES and sulphates of calcium and magnesium are responsible for permanent hardness of water .


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