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On what basis is conversion of milk into curd a chemical change?

Answer and explanation

Correct answer: Curd is a substance with new properties

A chemical change is recognized when one or more new substances with different properties are formed. During curd formation, bacteria convert some lactose into lactic acid, changing the taste, texture, and other properties of milk and producing curd. Thus option B is correct. Cooling, changing colour alone, or transferring milk to another container does not by itself establish formation of a new substance.

Related tags

ScienceClass 10Chemical ChangeCurd FormationLactic AcidChemical ReactionsChemical Reactions And EquationsChemical Substances – Nature And Behaviour

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