Setting of curd is a chemical change because a new substance(lactic acid) is formed. The curd formed has a different taste than the original substance. Also, once the curd is formed, milk cannot be re-obtained from it
mam can we take a example of popcorn as a example of chemical change. Because if we take the packet of popcorn it will be in a seeds and if we put it in a some coocker then it will change into popcorn mam.....................
a new substance, lactic acid, is formed from the lactose in milk. The curd has different properties and a different flavour than the milk, and the change is permanent. Once the curd is formed, you can't extract milk from it. :) IT IS CHEMICAL CHANGE
Yeah he is right as a new type of acid is formed called lactic acid after fermentation and if it would have been a physical change it would be impossible to form a new material
