Correct order of limiting molar conductivity for cations in water at $298 \ K$ is $:$

  • A
    $H^{+} > Na^{+} > K^{+} > Ca^{2+} > Mg^{2+}$
  • B
    $H^{+} > Ca^{2+} > Mg^{2+} > K^{+} > Na^{+}$
  • C
    $Mg^{2+} > H^{+} > Ca^{2+} > K^{+} > Na^{+}$
  • D
    $H^{+} > Na^{+} > Ca^{2+} > Mg^{2+} > K^{+}$

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