Order of ionic (limiting molar) conductivities of cations in water

1. A.
   ${Na}^{+} > K^{+} > {Rb}^{+} > {Cs}^{+}$
2. B.
   ${Cs}^{+} > {Rb}^{+} > K^{+} > {Na}^{+}$
3. C.
   $K^{+} > {Na}^{+} > {Cs}^{+} > {Rb}^{+}$
4. D.
   ${Rb}^{+} > {Na}^{+} > K^{+} > {Li}^{+}$

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1. A.
   $H^{+} > {Na}^{+} > K^{+} > {Ca}^{2 +} > {Mg}^{2 +}$
2. B.
   $H^{+} > {Ca}^{2 +} > {Mg}^{2 +} > K^{+} > {Na}^{+}$
3. C.
   ${Mg}^{2 +} > H^{+} > {Ca}^{2 +} > K^{+} > {Na}^{+}$
4. D.
   $H^{+} > {Na}^{+} > {Ca}^{2 +} > {Mg}^{2 +} > K^{+}$

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