Question

Give the reason why the dissolution of sugar in water is a physical change while burning of paper is a chemical change.

Answer 1

Physical change:

• A change in which a substance undergoes a change in its physical properties is called a physical change. A physical change is generally reversible. In such a change no new substance is formed.
• For example, dissolution of water.
• The dissolution of sugar in water is a physical change because no new substance is formed and this process.

Chemical change:

• A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
• For example, burning of paper.
• The burning of paper is a chemical change as new substances like ashes are formed.

Conclusion:

So, the dissolution of sugar in water is a physical change while the burning of paper is a chemical change.