The central metal ion of chlorophyll is .......

Which element is located at the center of the chlorophyll molecule?

How many types of pigments are found in the leaves of higher plants?

Photosynthetic pigments in chloroplast are embedded in the membrane of

Analogy type question:
$(1)$ Chlorophyll-$a$ : Blue-green color :: Chlorophyll-$b$ : .......
$(2)$ Chlorophyll-$a$ molecule in $PS-I$ : Absorption of $700 \,nm$ wavelength :: In $PS-II$ : .......

Chlorophyll $a$ appears ------ in colour $\&$ chlorophyll $b$ appears ------ in colour on chromatogram :-