The formula for chlorophyll a is

Solution(By Examveda Team)

The formula for chlorophyll a is C₅₅H₇₂O₅N₄Mg.
Chlorophyll is any of several related green pigments found in cyanobacteria and the chloroplasts of algae and plants. Chlorophyll allows plants to absorb energy from light.
All are defined as derivatives of the parent chlorin by the presence of a fifth, ketone-containing ring beyond the four pyrrole-like rings.
The only difference between chlorophyll a and chlorophyll b is that the former has a methyl group whereas the latter has a formyl group. This difference causes a considerable difference in the absorption spectrum, allowing plants to absorb a greater portion of visible light.