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Banking Chemistry General Concepts of Chemistry Question Bank General Concepts of Chemistry

  • question_answer
    An organic compound containing C, H and 0 gave on analysis C - 40% and H - 6.66%. Its empirical formula would be

    A)  \[{{C}_{3}}{{H}_{6}}O\]                   

    B)  CHO

    C)  \[C{{H}_{2}}O\]            

    D)         \[C{{H}_{4}}O\]

    Correct Answer: C

    Solution :

    Element % At/wt. Rel. Number Ratio
    C 40 12 \[\frac{40}{12}=3.33\] \[\frac{3.33}{3.33}=1\]
    H 6.66 1 \[\frac{6.66}{1}=6.66\] \[\frac{6.66}{3.33}=2\]
    O 53.34 16 \[\frac{53.35}{16}=3.33\] \[\frac{3.33}{3.33}=1\]
     (% of O in organic compound = 100 - (40 + 6.66) = 53.34%) Empirical formula of organic compound = \[C{{H}_{2}}O\].


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