. In the neighbourhood of your school, hard water required for an experiment is not available


Select from the following groups of salts available in your school, a group each member of which, if dissolved in distilled water, will make it hard:

(a)Sodium chloride, calcium chloride         

(b) Potassium chloride, sodium chloride

(c) Sodium chloride, magnesium chloride  

(d) Calcium chloride, magnesium chloride

 

Best Answer

Ans. (d) Calcium chloride, magnesium chloride

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