BHU PMT BHU PMT (Mains) Solved Paper-2005

  • question_answer
    The emperical formula for chlorophyll-b is :

    A)  \[{{\text{C}}_{\text{54}}}{{\text{H}}_{\text{70}}}{{\text{O}}_{\text{6}}}{{\text{N}}_{\text{4}}}\text{Mg}\]        

    B)  \[{{\text{C}}_{\text{55}}}{{\text{H}}_{\text{70}}}{{\text{O}}_{\text{6}}}{{\text{N}}_{\text{4}}}\text{Mg}\]

    C)  \[{{\text{C}}_{45}}{{\text{H}}_{\text{72}}}{{\text{O}}_{5}}{{\text{N}}_{4}}\text{Mg}\]

    D)  \[{{\text{C}}_{45}}{{\text{H}}_{\text{72}}}{{\text{O}}_{\text{6}}}{{\text{N}}_{5}}\text{Mg}\]

    Correct Answer: C

    Solution :

                     Chlorophyll-b is olive green in the pure state with an empirical formula of \[{{C}_{55}}{{H}_{70}}{{O}_{6}}{{N}_{4}}Mg\]and molecular weight of 907.


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