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JEE Main2003ChemistryHydrogenActual

Which one of the following processes will produce hard water?

Options

  1. ASaturation of water with MgCO ₃
  2. BSaturation of water with CaSO ₄
  3. CAddition of Na ₂ SO ₄ to water
  4. DSaturation of water with CaCO ₃

Correct answer

B. Saturation of water with CaSO ₄

Step-by-step solution

Permanent hardness of water is due to chlorides and sulphates of calciumand magnesium.

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