Question:
The type of functional group associated with cation exchange resin is
The type of functional group associated with cation exchange resin is
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Cation = Acidic group (contains H to swap). Anion = Basic group (contains OH or Amine to swap).
Updated On: May 5, 2026
- -OH
- -$SO_{3}H$
- - $NH_{2}$
- -CHO
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The Correct Option is B
Solution and Explanation
Step 1: Concept Cation exchange resins are high molecular weight, cross-linked polymers containing acidic functional groups.
Step 2: Meaning These resins exchange their $H^{+}$ ions for cations like $Ca^{2+}$ or $Mg^{2+}$ present in hard water.
Step 3: Analysis Strong acid cation resins typically contain sulfonic acid groups (-$SO_{3}H$), while weak acid ones might contain carboxylic groups (-COOH).
Step 4: Conclusion Among the options, -$SO_{3}H$ is the standard functional group for cation exchange.
Final Answer: (B)
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