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KVPY Sample Paper KVPY Stream-SX Model Paper-13

  • question_answer
    A solution of sodium sulphate contains 92 g \[\text{N}{{\text{a}}^{+}}\]of ions per kilogram of water. The molality of \[\text{N}{{\text{a}}^{+}}\]ions in that solution in \[\text{K}{{\text{g}}^{-1}}\] is:

    A) 16

    B) 8

    C) 4

    D) 12

    Correct Answer: C

    Solution :

    \[{{n}_{n{{a}^{\,\,+}}}}=\,\frac{92}{23}\,=\,4\] So, molality = 4


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