Question

How would you show that setting of curd is a chemical change?

Answer 1

Once the curd is formed, milk cannot be re-obtained from it. Also, both milk and curd have different properties. Since these are the properties of a chemical change, the setting of curd is a chemical change.

Answer 2

• When curd sets, its chemical composition changes.
• Curd is obtained as a new substance.
• Curd cannot be obtained again in its original state (milk).
• The chemical properties change.
• Its taste becomes sour.

Thus, the setting of curd is a chemical change.