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JEE Main & Advanced Chemistry Biomolecules / जैव-अणु Question Bank Critical Thinking Biomolecules

  • question_answer
    A compound of mol. wt. 180 is acetylated to give a compound of mol. wt. 390. The number of amino groups in the initial compound is                                      [KCET 1996]

    A)                 2             

    B)                 4

    C)                 5             

    D)                 6

    Correct Answer: C

    Solution :

               Difference in mass of compound                   = 390 ? 180 = 210            wt. of \[C{{H}_{3}}CO\] ? group is = 43                 Therefore no. of \[-N{{H}_{2}}\] group = \[\frac{210}{43}=4.88=5\].


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