2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-80

  • question_answer
    When concentration approaches zero, the molar conductivity is known as limiting molar conductivity and represented by\[\Lambda {{{}^\circ }_{M}}\]. Which of the following is correct order of molar conductivity at infinite dilution?

    A)  \[\operatorname{LiC}l> KCl> NaCl\]     

    B)  \[\operatorname{KCl}>NaCl> LiCl\]

    C)  \[\operatorname{LiCl}> NaCl> KCl\]     

    D)  \[\operatorname{NaCl}> KCl> LiCl\]

    Correct Answer: B

    Solution :

    Conductivity of ionic salt depends upon ionic mobility and ionic mobility depends upon size of ions in aqueous solution smaller hydrated ion has larger value of ionic mobility, hence higher value of molar conductivity. Hydrated radii of Li, Na and K are as follows \[{{\operatorname{Li}}^{+}}\,>\,\,N{{a}^{+}}>{{K}^{+}}\] \[\therefore \] Molar conductivity at infinite dilution is correctly ordered in option [b].


You need to login to perform this action.
You will be redirected in 3 sec spinner