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JEE Main2015ChemistryHydrogenActual

Permanent hardness in water cannot be cured by:

Options

  1. ATreatment with washing soda
  2. BIon exchange method
  3. CCalgon's method
  4. DBoiling

Correct answer

D. Boiling

Step-by-step solution

Permanent hardness due to S O 4 2 - , C l - of C a 2 + and M g 2 + cannot be removed by boiling.

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