Question

Formation of curd in an irreversible and chemical changes. Illustrate with example​

Answer 1

Formation of curd from milk:

Formation of curd from milk is a type of chemical reaction or chemical change because called cannot be reversed back into milk by changing the conditions and the new product form is curd. Hence, it is an example of chemical change.

Answer 2

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. It is an irreversible change.