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Punjab Medical Punjab - MET Solved Paper-2007

  • question_answer
    The percentage of \[C,\,\,H\] and \[N\] in an organic compound are \[40%,\,\,13.3%\] and \[46.7%\] respectively then empirical formula is

    A) \[{{C}_{3}}{{H}_{13}}{{N}_{3}}\]               

    B) \[C{{H}_{2}}N\]

    C) \[C{{H}_{4}}N\]                

    D) \[C{{H}_{6}}N\]

    Correct Answer: B

    Solution :

    Table for Empirical formula
    Element % At. Wt. Relative Number Ratio of elements
    C H N 40.0 13.3 46.7 12 1 14 40/12=3.33 13.3/1=13.3 46.7/14=3.33 3.33/3.33=1 13.3/3.33=4 3.33/3.33=1
    Hence, empirical formula of compound is \[C{{H}_{4}}N\].


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