Question

.......... is used for desalination of brackish water.

• A. Reverse osmosis
• B. Ion-exchange
• C. Adsorption
• D. Electrodialysis

Answer 1

Answer: (A)

Reverse osmosis

• Brackish water has high salts level but lower than that of the sea. Desalination of brackish water to make it fit for drinking is done by reverse osmosis.
• In this process, a pressure greater than the osmotic pressure is applied to the solution which forces the solution to pass through a membrane that retains solutes on one side, and the only pure solvent is allowed to pass through it.
• Thus, salts get removed and the brackish water is desalinated.

So, the correct answer is A.