Question

Q. Purification of brackish water by reverse osmosis is also called?
a) electro-dialysis
b) superfiltration
c) zeolite
d) ion exchange​

Answer 1

Answer:

option B

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Answer 2

Answer:

Option (d) Ion exchange is correct.

Explanation:

• Ion exchange is a fast and reversible process where the ions of impurities in water are substituted by the ions given out by the ion-exchange resins.
• The ion exchange resins are long-chain polymers carrying exchangeable ions. These ions are:

1. Cation exchange resin- capable of exchanging its H⁺.
2. Anion exchange resin- capable of exchanging its OH⁻.

• An ion exchange process can soften hard water like brackish water which is salty.

Conclusion:

Purification of brackish water by reverse osmosis is called the ion exchange process.