Question

Curdling is a desirable change, formation of ice from water is also a desirable change. But one is a chemical change and other is a physical change. Decide which one is a physical change and which one is a chemical change. Why both changes are desirable

Answer 1

curdling is a chemical change because it is made by milk n it will change within hours as curd ..

Answer 2

curdling is a chemical change because it is made by milk n it will changes hours curd