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NEET Chemistry Analytical Chemistry Question Bank Self Evaluation Test - Analytical Chemistry

  • question_answer
    If 0.2 gram of an organic compound containing carbon, hydrogen and oxygen on combustion, yielded 0.147 gram carbon dioxide and 0.12 gram water. What will be the content of oxygen in the substance?

    A) 73.29%            

    B) 78.45%

    C) 83.23%            

    D) 89.50%

    Correct Answer: A

    Solution :

    [a]  %\[ofC=\frac{12}{44}\times \frac{0.147}{0.2}\times 100=20.045\]% % of \[H=\frac{2}{18}\times \frac{0.12}{0.2}\times 100=6.666%\]% % of \[O=100-\left( 20.045+6.666 \right)=73.29%\]%


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