Question

A small quantity of curd is added to warm milk. The milk is stirred and is set aside for few hours at a warm place. In a few hours, the curd is formed. This is an irreversible change because

• A. Curd cannot be converted back to milk.
• B. Curd can be converted back to milk.
• C. Sometimes curd can be reverted back to milk and sometimes not.
• D. No change is happening.

Answer 1

The correct option is A

Curd cannot be converted back to milk.

After curd is formed, it cannot be converted back to milk, so this change is an irreversible change.