In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is:
Option: 1 less efficient as the resins cannot be regenerated
Option: 2 less efficient as it exchange only anions
Option: 3More efficient as it can exchange only cations
Option: 4More efficient as it exchange both cations as well as anions
As we have learnt,
Therefore, Option(4) is correct.
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