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Manipal Medical Manipal Medical Solved Paper-2001

  • question_answer
    A hydrocarbon contains 20% hydrogen and 80% carbon. The empirical formula is:

    A)  \[C{{H}_{4}}\]             

    B)  \[C{{H}_{3}}\]

    C)  \[C{{H}_{2}}\]            

    D)  \[CH\]

    Correct Answer: B

    Solution :

     
    Element Percentage Atomic mass Relative number of atoms Simplest ratio
    H 20 1 20 20/6.66=3
    C 80 12 6.66 6.66/6.66=1
    \[\therefore \]Empirical formula \[=C{{H}_{3}}\]


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