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
 

Answers (1)

As we have learnt,

The synthetic resins method is more efficient as it can exchange both cations and anions.

Therefore, Option(4) is correct.

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