Solution:
Curd and Vinegar contain acids.Lactic acid bacteria and the casein protein found in milk react to form the curd. The molecular formula lactic acid, often known as milk acid, is an organic acid. Lactic acid results from the fermentation of milk sugar, often known as lactose. Cottage cheese, leban, sour milk, yoghurt, and Koumiss contain it. Acetic acid ( is a component of vinegar. Therefore, Ethanoic acid is also named acetic acid. The chemical composition of vinegar is the same as that of alcohol since acetic acid is its main component.
