Question

Give two examples for the following case: Physical changes that are not reversible.

Answer 1

Physical change:

• When only the physical characteristics of a material such as its size, shape, color, condition, or appearance change, then this is referred to as a physical change in the substance.
• No chemical reaction takes place between the compounds and the product has the same properties as the reactant.
• They are generally reversible except for some examples.
• Cutting of trees into logs, breaking of glass.

Therefore, cutting trees into logs, and breaking glass are two examples of physical changes that are irreversible.