Punjab Medical Punjab - MET Solved Paper-2008

  • question_answer
    Which of the following has lowest boiling point?

    A) \[NaCl\]                              

    B) \[CuCl\]

    C) \[CuC{{l}_{2}}\]                

    D) \[CsCl\]

    Correct Answer: C

    Solution :

    According to Fajans rule, as the size of cation decrease, its polarising power increases. Hence, \[C{{u}^{2+}}\] polarise \[C{{l}^{-}}\] ions more than\[C{{u}^{+}},\] Therefore, \[CuC{{l}^{2}}\] has more covalent character and hence, its boiling point is less.


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