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J & K CET Engineering J and K - CET Engineering Solved Paper-2008

  • question_answer
    The stoichiometry of the following reaction is \[{{K}_{2}}{{S}_{2}}{{O}_{8}}(aq)+2KI(aq)\to 2{{K}_{2}}S{{O}_{4}}(aq)+{{I}_{2}}(aq)\]

    A)  2:2         

    B)  1:1

    C)  1:2         

    D)  2:1

    Correct Answer: C

    Solution :

     \[{{K}_{2}}{{S}_{2}}{{O}_{8}}(aq)+2KI(aq)\xrightarrow{{}}2{{K}_{2}}S{{O}_{4}}(aq)+{{I}_{2}}(aq)\]In this reaction one mole of \[{{K}_{2}}{{S}_{2}}{{O}_{8}}\]reacts with 2 moles of KI, hence the stoichiometry of this reaction is 1: 2.


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