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Mention any one hydrolytic product of lecithin.

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Hint: Lecithin is a group of yellow-brownish fatty substances occurring in animal and plant tissues composed of glycerol, one or two molecules of fatty acid, and a phosphoric acid compound.
The molecular formula of lecithin is ${ C }_{ 42 }{ H }_{ 80 }{ NO }_{ 8 }{ P }$

Complete step by step answer:
Hydrolyzed lecithin: To modify the performance of lecithin to make it suitable for the product to which it is added, it may be hydrolyzed enzymatically. In hydrolyzed lecithins, a portion of the phospholipids has one fatty acid removed by phospholipase. Such phospholipids are called lysophospholipids.
The most commonly used phospholipase is phospholipase ${ A }_{ 2 }$, which removes the fatty acid at the ${ C }_{ 2 }$ position of glycerol. Lecithins may also be modified by a process called fractionation. During this process, lecithin is blended with an alcohol, typically ethanol. Some phospholipids, such as phosphatidylcholine, have good solubility in ethanol, whereas most other phospholipids do not dissolve well in ethanol. The ethanol is separated from the lecithin sludge, after which the ethanol is removed by evaporation to obtain a phosphatidylcholine-enriched lecithin fraction.
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The hydrolysis reaction of lecithin with lipase enzyme in aqueous solutions. Hydrolysis of lecithin saturated or unsaturated acyl are present as residue.

Note: The possibility to make a mistake is that you have to hydrolyze the reaction in the presence of an enzyme and it does not occur in the absence of enzymes.