First slide

Cathode ray experiment

Question

Correct order of mobility in fused state

Easy

A

$L i^{+} > K^{+} > N a^{+} > R b^{+}$
B

$L i^{+} > N a^{+} > K^{+} > R b^{+}$
C

$R b^{+} > K^{+} > N a^{+} > L i^{+}$
D

$R b^{+} > N a^{+} > K^{+} > L i^{+}$

Solution

$I n f u s e d s t a t e, i o n i c s i z e o f L i + < N a + < K + < R b + < C s + ∴ m o b i l i t y o f L i + > N a + > K + > R b + > C s + I n a q u e o u s s o l u t i o n : H y d r a t i o n e n t h a l p y α \frac{1}{s i z e o f i o n}$

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