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  3. BHU PMT

BHU PMT BHU PMT (Mains) Solved Paper-2006

  • question_answer
    The percentage by weight of hydrogen in \[{{C}_{2}}{{H}_{5}}OH\]is:

    A)  20%                                      

    B)  23.08%

    C)  13.04%                                

    D)  10.15%

    Correct Answer: C

    Solution :

                     Molecular mass of \[{{C}_{2}}{{H}_{5}}OH=2\times 12+6\times 1+16\] \[=24+6+16\] \[=46\] \[\therefore \]percentage of hydrogen\[=\frac{6}{46}\times 100\]     \[=13.04%\]


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