Question

what is chemical change

Answer 1

the ans is theChemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.
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Answer 2

Greetings..!

A chemical change is such a change in which one or more substances(reactants) react chemically to form new substances(products) with new set of properties . A chemical change can be characterized by the following :

• The composition of reactants change.
• the properties of reactants are altered .
• there is exchange of energy.
• evolution of gas, change of colour etc.
• the change is irreversible.

Examples include curdling of milk,fermentation etc..