JEE Main & Advanced Chemistry Organic Chemistry: Some Basic Principles & Techniques Question Bank Chemical analysis of organic compounds

  • question_answer A compound contains \[C=90%\] and \[H=10%\]. Empirical formula of the compound is [NCERT 1976; EAMCET 1978]

    A) \[{{C}_{3}}{{H}_{10}}\]

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

    C) \[{{C}_{3}}{{H}_{2}}\]

    D) \[{{C}_{3}}{{H}_{4}}\]

    Correct Answer: D

    Solution :

    Elements       No. of Moles         Simple ratio
    C = 90% 90/12 = 7.5 7.5/7.5 = 1\[\times \]3 = 3
    H = 10% 10/1 = 10 10/7.5 = 1.33 × 3 = 4
    \ Empirical formula = \[{{C}_{3}}{{H}_{4}}\]


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