'Formation of curd is an irreversible as well as a chemical change.' Justify
this statement.
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It is an irreversible change because after the formation of curd from milk we cannot get back the original substance that is milk and it is a chemical change because a new substance is formed that is curd which has different taste other than milk.
During the formation of the curd from the milk the chemical composition is changed, so it is considered to be chemical change. Once Curd formed from Milk it cannot revert back to milk, so it is an irreversible change
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