JEE Main20207 Jan 2020Morning ShiftChemistryHydrogenActual
In comparison to the zeolite process for the removal of permanent hardness, the synthetic resin method is
Options
- Aless efficient as it exchanges only anions.
- Bmore efficient as it can exchange both cations as well as anions.
- Cless efficient as the resins cannot be regenerated.
- Dmore efficient as it can exchange only cations.
Correct answer
B. more efficient as it can exchange both cations as well as anions.
Step-by-step solution
Zeolite removes only cations from hard water, as given below by reaction: 2   NaZ   +   M + 2 ( aq ) → MZ 2   +   2   Na +   Here   M - Ca ,   Mg While, synthetic resin removes both cations and anions, as given by following reactions: For cations- 2   RNa ( s )   + M + 2 ( aq ) →   R 2 M   ( s ) +   2 Na + ( aq ) For anions- RNH 3 + OH - ( s )   +   X - ( aq )   → RNH 3 + X -   ( s ) +   OH - ( aq ) So,