. In a locality, hard water, required for an experiment, is not available


However, the following salts are available in the school laboratory:

1. Sodium sulphate  

2. Calcium sulphate

3. Magnesium chloride

4. Sodium chloride

5. Calcium chloride

6. Potassium sulphate

Which  of  the  above  salts  may  be  dissolved in  water  to  obtain   hard  water  for  the experiment

(A) 2, 3 and 5          (B) 1, 2 and 5          (C) 1, 2, 4 and 6      (D) 3 and 5 only

 

 

Best Answer

Ans. (A) 2, 3 and 5 

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