Question

Which of the following is a chemical change? 1] Cutting of tree 2] Rusting of iron 3] Burning of candle 4] Water converting into steam ​

Answer 1

Answer:

In a chemical change the main chemical composition of the substance changes.Chemical changes are irreversible.

In the above question 2) Rusting of iron is a chemical change

Answer 2

Rusting of iron is a chemical change.

• There are two types of changes, 1) Physical change 2) Chemical change.
• The changes which include chemical reactions are known as the chemical changes.
• Similarly, the rusting of iron is a chemical change because it includes chemical reaction. The oxidation is also included in this chemical reaction.
• Rest of the changes are physical changes. Almost no chemical reaction is included in these changes.