BCECE Engineering BCECE Engineering Solved Paper-2007

  • question_answer
    KI and \[CuS{{O}_{4}}\]solutions on mixing produce

    A) \[C{{u}_{2}}{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\]

    B)  \[C{{u}_{2}}{{I}_{2}}+{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\]

    C)  \[Cu{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\]

    D)  \[Cu{{I}_{2}}+{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\]

    Correct Answer: B

    Solution :

    \[CuS{{O}_{4}}+2KI\xrightarrow{{}}Cu{{I}_{2}}+{{K}_{2}}S{{O}_{4}}\] \[2Cu{{I}_{2}}\xrightarrow{{}}\underset{\begin{smallmatrix}  \text{Cuprous}\,\text{iodide} \\  \,\,\,\,\,\,\,\,\,\,\text{white}\,\text{ppt}\text{.} \end{smallmatrix}}{\mathop{C{{u}_{2}}{{I}_{2}}}}\,+{{I}_{2}}\]


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