Uttarakhand PMT Uttarakhand PMT Solved Paper-2007

  • question_answer
    The percentage by weight of hydrogen in\[{{H}_{2}}{{O}_{2}}\]is

    A)  5.88           

    B)  6.25

    C)  25             

    D)  50

    Correct Answer: A

    Solution :

     \[{{H}_{2}}{{O}_{2}}2H\] 34 g         2 g 34 g of\[{{H}_{2}}{{O}_{2}}\]gives 2g of hydrogen 100 g of\[{{H}_{2}}{{O}_{2}}\]will give hydrogen \[=\frac{2}{34}\times \frac{100}{1}=5.88\,g\]


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