Question

Dissolution of sugar in water is a __________ change while burning of paper is a _______ change.

• A. Physical
• B. Chemical

Answer 1

Chemical change:

• A chemical change is a permanent change in which new substances are formed.
• The chemical change is permanent and cannot be reversed by a simple physical method.
• A chemical change involves an exchange of energy in the form of heat or light.
• For example, rusting of iron, burning of wood, etc.

Physical change:

• A physical change is a change in which no new substance is formed.
• A physical change is a temporary change and reversible change.
• A physical change may cause changes in the state, shape, size, and color of a substance.
• For example, glowing of an electric bulb, breaking of a glass tumbler, dissolution of sugar in water, etc.

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