A) \[{{C}_{55}}{{H}_{70}}{{O}_{6}}{{N}_{4}}Mg\]
B) \[{{C}_{55}}{{H}_{72}}{{O}_{5}}{{N}_{4}}Mg\]
C) \[{{C}_{22}}{{H}_{72}}{{O}_{5}}{{N}_{4}}Mg\]
D) \[{{C}_{22}}{{H}_{72}}{{O}_{5}}{{N}_{4}}Mg\]
Correct Answer: B
Solution :
: The molecular formula of chlorophyll a is \[{{C}_{55}}\text{ }{{H}_{72}}\text{ }{{O}_{5}}{{N}_{4}}\text{ }Mg\] and that of chlorophyll b is\[{{C}_{55}}\text{ }{{H}_{70}}\text{ }{{\text{O}}_{6}}\text{ }{{N}_{4}}\text{ }Mg\]. In chlorophyll b there is a \[-CHO\]group instead of a\[-C{{H}_{3}}\]group at the 3rd C atom in II pyrrol ring.
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