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Hard water required for an experiment is...

Hard water required for an experiment is not available in a schol laboratory. However, following salts are available in the laboratory. Select the salt which may be dissolved in water to make it hard for the experiment.
Calcium sulphate
Sodium sulphate
Calcium chloride
Potassium sulphate
sodium hydrogen carbonate
Magnesium chloride

A

1,2 and 4

B

1,3 and 6

C

3,5 and 6

D

2,4 and 5

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MODERN PUBLICATION-CARBON AND ITS COMPOUNDS-EXERCISE
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