Question

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

Answer 1

HEY DUDE !

Curdling is a chemical change as once the bacteria lactobacillus had turned the milk into curd,

You can't turn the curd into milk.

Whereas,

Formation of ice is a physical change as once you had converted water into ice you can again convert ice into water by giving heat...

• The reason why both of them are desirable as you turn milk into curd only when you need it
• Similarily you turn water into ice ,when you want them.

HOPE THIS WILL HELP YOU

PLEASE TRY TO MARK IT AS BRAINLIEST....