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In the Neighbourhood of Your School, Hard Water Required for an Experiment is Not Available. Select from the Following Group of Salts Available in Your School, a Group Each Member of Which, If Dissolved in Distilled Water, Will Make It Hard - Science

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

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Solution

(d) Dissolving chloride salts of calcium or magnesium in distilled water will make the water hard, and lather formation will take place with difficulty.

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