4AB › Chemistry PYQ › CSIR-NET › December 2014 › Q57Q57 · CSIR-NET Chemistry, December 2014 Paper: CSIR-NET December 2014 · Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanides & Actinides – General · Marks: 2 · Difficulty: Hard
The correct order of the retention of cations on a sulfonated cation exchange resin column is
(a) $\mathrm{Ag}^{+}>\mathrm{K}^{+}>\mathrm{Na}^{+}>\mathrm{Li}^{+}$
(b) $\mathrm{K}^{+}>\mathrm{Na}^{+}>\mathrm{Ag}^{+}>\mathrm{Li}^{+}$
(c) $\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{K}^{+}>\mathrm{Ag}^{+}$
(d) $\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{Ag}^{+}>\mathrm{K}^{+}$
Answer Answer: A ✓ checked by 4AB · confidence high
Explanation Retention on a sulfonated resin increases with the polarisability/charge density of the cation in its hydrated form: Ag⁺ > K⁺ > Na⁺ > Li⁺ (the small, heavily hydrated Li⁺ is held least).
← Q56 · All questions in this paper · Lanthanides and Actinides chapter list · Q58 → Study loop for Lanthanides and Actinides
Open in whiteboard · Browse this chapter in the app