Cation exchanger is regenerated usually with_________________________?
Correct answer: D. H2SO4
- A. NaOH
- B. Alum solution
- C. Hydrazine
- D. H2SO4
Explanation
A cation exchanger replaces positive ions with hydrogen ions during regeneration, so a strong acid such as H₂SO₄ is used. NaOH is generally used to regenerate anion exchangers.
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