Which of the following is true with the conversion of milk to curd?

It is a physical change.

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It is a reversible change.

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It involves changes in chemical composition.

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It is a chemical change and a reversible change.

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Solution

The correct option is C
It involves changes in chemical composition.

Turning milk into curd is a chemical change. A chemical change is defined as a change in which composition of substance changes. The compositions of curd and milk are different. After converting milk into curd, we cannot get back the milk again. So, it is an irreversible change.

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Question 7

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