JEE Main 2003Annual, Paper 1ChemistryEasyHydrogen84× since 2003Which one of the following process will produce hard water?AOption A. Saturation of water with MgCO₃BOption B. Saturation of water with CaSO₄COption C. Addition of Na₂SO₄ to waterDOption D. Saturation of water with CaCO₃CheckSkip · show solution
