Question

chemical and physical changes ​

Answer 1

Answer:

Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc. Generally, physical changes do not involve the production of energy.

Answer 2

Answer:

Physical change:-

A change that changes only the physical traits of the substance, without making any change in their internal structure. Examples of physical change include: boiling of water, chopping wood, dissolving sugar in water, crumpling of paper, melting an ice cube, etc.

Chemical change :-

A change that changes by affecting the internal structure of the substance to form a new substance. Examples of chemical change include: digesting food, burning wood, baking a cake, curdling of milk, mixing acid, boiling an egg, rusting of iron, etc