JEE Main & Advanced Sample Paper JEE Main Sample Paper-19

  • question_answer If \[C{{l}_{2}}\] gas is passed into aqueous solution of \[KI\] containing some \[CC{{l}_{4}}\] and the mixture is shaken, then".

    A)  Upper layer becomes violet

    B)  Lower layer becomes violet

    C)  Homogenous violet layer is formed

    D)  None

    Correct Answer: B

    Solution :

     \[2KI+C{{l}_{2}}\to 2KCl+{{I}_{2}}\] \[{{I}_{2}}+CC{{l}_{4}}\to \] Violet Colour Note: The excess of \[C{{l}_{2}}\] should be avoided. The layer may become colorless due to conversion of \[{{I}_{2}}\] to \[HI{{O}_{3}}\] \[{{I}_{2}}+5C{{l}_{2}}+6{{H}_{2}}O\to 2HI{{O}_{3}}+10HCl\] In case of \[B{{r}_{2}};\] \[B{{r}_{2}}+2{{H}_{2}}O+C{{l}_{2}}\to 2HBrO+2HCl\]


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