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Solution - Soaps and Detergents

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Question

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

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Solution for concept: Soaps and Detergents. For the course 8th-10th CBSE
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