Question

class 7 science pse please give me correct answer ​

Answer 1

Answer:

Setting of curd is a chemical change because a new substance(lactic acid) is formed. The curd formed has a different taste than the original substance. Also, once the curd is formed, milk cannot be re-obtained from it. It is an irreversible change.

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Answer 2

It is a chemical change because it is irreversible as we can't get back the milk. Also, a new substance is formed with different taste, smell and other chemicals properties.

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