Under normal condition, pure chlorophyll (of course they are different kinds of chlorophylls and they have different structures) is a solid. But they may be mixed and dissolved in different liquids.
As well as Xiaohan’s answer, I think chlorophyll is not just one molecule, but a mixture of two – chlorophyll a and chlorophyll b.
The primary pigment of photosynthesis is chlorophyll A. Chlorophyll B is an accessory pigment because it is not necessary for photosynthesis to occur. All organisms that perform photosynthesis have chlorophyll A, but not all organisms contain chlorophyll B.
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