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NEET Sample Paper NEET Sample Test Paper-47

  • question_answer
    The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is:

    A) +4                   

    B) +6     

    C) +2                   

    D) +3

    Correct Answer: D

    Solution :

    +3 \[\operatorname{KI}+{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] \[\operatorname{Oxidation}: 2{{I}^{-}}\to {{I}_{2}}+ 2e\]             \[\operatorname{Reduction}: C{{r}_{2}} {{O}^{2-}}_{7} +14{{H}^{+}}+ 6e \to 2C{{r}^{3+}} +7 {{H}_{2}}0\]


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