JCECE Engineering JCECE Engineering Solved Paper-2014

  • question_answer
    The percentage of water of crystallisation of a sample of blue vitriol is

    A) \[34.07%\]                         

    B) \[35.07%\]

    C) \[36.07%\]                         

    D)  \[37.07%\]

    Correct Answer: C

    Solution :

    Blue vitriol is\[CuS{{O}_{4}}\cdot 5{{H}_{2}}O\] Molecular weight of \[CuS{{O}_{4}}\cdot 5{{H}_{2}}O=249.5\] % of water of crystallisation\[=\frac{5\times 18}{249.5}\times 100\] \[=36.07%\]


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