NEET Sample Paper NEET Sample Test Paper-33

  • question_answer
    Which of the following halogens does not undergo disproportionation reaction on treatment with alkali?

    A)  \[C{{l}_{2}}\]               

    B)  \[B{{r}_{2}}\]

    C)  \[{{F}_{2}}\]               

    D)  \[{{I}_{2}}\]

    Correct Answer: C

    Solution :

    Disproportionation reactions give both oxidise and reduced products from the same species. \[{{F}_{2}}\]reacts with \[NaOH\]to give only the reduced product \[{{F}^{-}}\]. \[2{{F}_{2}}+4NaOH\xrightarrow{Cold}2NaF+O{{F}_{2}}+{{H}_{2}}O\] \[2{{F}_{2}}+4NaOH\xrightarrow{Hot}4NaF+2{{H}_{2}}O+{{O}_{2}}\]


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