Question

Empirical formula of chlorophyll–a is _________

• A. C$_{55}$H$_{72}$O$_4$N$_5$Mg
• B. C$_{72}$H$_{55}$O$_5$N$_4$Mg
• C. C$_{55}$H$_{70}$O$_5$N$_4$Mg
• D. C$_{55}$H$_{72}$O$_5$N$_4$Mg

Hint:

{Chlorophyll–a contains Mg at the centre}.

Answer 1

The Correct Option is D

Step 1: Understanding chlorophyll structure.
Chlorophyll–a is the primary photosynthetic pigment present in green plants and contains magnesium at its centre.

Step 2: Identifying correct formula.
The accepted empirical formula of chlorophyll–a is C$_{55}$H$_{72}$O$_5$N$_4$Mg.

Step 3: Conclusion.
Therefore, the correct answer is C$_{55$H$_{72}$O$_5$N$_4$Mg}.