Question : Which among the following combinations is present in higher amounts in hard water?
Option 1: Calcium and Magnesium
Option 2: Calcium and Sodium
Option 3: Sodium and Magnesium
Option 4: Sodium and Manganese
Correct Answer: Calcium and Magnesium
Solution : The correct answer is Calcium and Magnesium .
Calcium and magnesium are present in higher amounts in the hard water. Soaps do not act in hard water due to the presence of these salts, but detergents can give results in hard water. The temporary hardness of water is caused by the carbonates of calcium and magnesium. Calcium is a mineral our body needs to build and maintain strong bones.
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