Question

1. Which of the following is not a chemical change?
a) Formation of curd b) ripening of banana c) corrosion of iron
d) melting of wax​

Answer 1

Melting of wax is not a chemical change.

Option (d).

Explanation:

• Mainly there are two types of changes which are chemical and Physical.

• Such changes in which a new substance is formed from a substance and which can’t be reversed such changes are known as the Chemical changes.

• Among the given options Formation of Curd,  Ripening of banana and Corrosion of iron are examples of a chemical reaction as each of these changes can not be reversed back whereas melting of wax is a physical change as in this there is only change in the physical state , no new substance is formed.

Learn more about chemical change

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Answer 2

Melting of wax is not a chemical change

Explanation:

It is a type of change which can't be reversed and involve rearrangement of  atoms.

Chemical change causes formation of 2 or more new substance.

When chemical changes occur, it causes change in the ecosystem.

Example of some chemical change includes-Rusting of iron, boiling of egg,baking a cake,heating sugar to form caramel,digestion of food,souring milk etc.