why chlorophyll a is more soluble in petroleum ether while chlorophyll b is more soluble in 92% methyl alcohol.??

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Solution

Dear student,
At carbon 3 in chlorophyll a methyl group is present while in chlorophyll b aldehydic group is present due to which chlorophyll b becomes more polar than chlorophyll a. Therefore chlorophyll a is more soluble in non polar solvent like petroleum ether and chlorophyll b is more soluble in polar solvent like methyl alcohol.

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