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JEE Main & Advanced JEE Main Paper (Held on 08-4-2019 Afternoon)

  • question_answer
    The percentage composition of carbon by mole in methane is : [JEE Main 8-4-2019 Afternoon]

    A) 80%                

    B) 25%

    C) 75%    

    D)   20%

    Correct Answer: D

    Solution :

    \[C{{H}_{4}}\] % by mole of carbon \[=\frac{1\,mol\,atom}{5\,mol\,atom}\times 100\] \[=20%\]


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