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BVP Medical BVP Medical Solved Paper-2008

  • question_answer
    If \[N{{a}^{+}}ion\] is larger than \[M{{g}^{2+}}\] ion and \[{{S}^{2-}}\]ion is larger than CF ion, which of the following will be stable soluble in water?

    A)  Sodium chloride

    B)  Sodium sulphide

    C)  Magnesium chloride

    D)  Magnesium sulphide

    Correct Answer: D

    Solution :

                    Magnesium sulphide. Higher the lattice energy lower the solubility. Out of the four combinations possible, the lattice energy of MgS (bi-bivalent ionic solid) is higher than those of \[N{{a}_{2}}S,\,\,MgC{{l}_{2}}\] (uni-bivalent or biuni- valent ionic solids) and \[NaCl\] uni-univalent ionic solids) and hence, MgS is the least soluble.


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