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aminamoazzam

  • one year ago

MCQ question help needed !

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  1. aminamoazzam
    • one year ago
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    this is the question .. the ans is B .. but why ? can somebody explain ..

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  2. anonymous
    • one year ago
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    A is wrong because by adding manganese (IV) oxide you're just speeding up the reaction but the oxygen produced will be the same

  3. anonymous
    • one year ago
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    Note manganese(IV)oxide is a catalyst

  4. anonymous
    • one year ago
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    Water is already a product form of hydrogen peroxide water is only decomposed by electrolysis which is not happening because you're heating h2O2 right? So C is not right D is just increasing the rate of reaction again B is correct because only small amount of h2O2 is given notice the curve slightly about curve X? Which indicates a little h2O2 has been added to increase the volume of Oxygen.

  5. anonymous
    • one year ago
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    It takes more time for the reaction to complete because catalyst is limiting as substrate has been added

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