Question

Give reason:
Cutting off cloth pieces is a physical change. Though it cannot be reversed.

Answer 1

To answer this question, we first need to differentiate between a physical change and chemical change. Physical change and chemical change are further understood by reversible or non-reversible changes, which will give the reason for the above statement.

Complete step by step answer:
Physical change: if the change is temporary and there is no formation of a new compound. That is, there is no change in chemical composition, colour, state, shape, size, etc. Several examples of physical change are drying of wet clothes, manufacture of salt from seawater, boiling of water etc. The releasing or absorbing of light or energy may be or may not be seen in physical change. There may also be the change in the weight of the substance taken.
Chemical change: if the change is permanent and there is a formation of a new compound. This new compound may have different properties such as chemical composition, colour, state size, shape, etc. Several examples of chemical change are the burning of paper. Burning of coal, curdling of milk etc. The releasing or absorbing of light or energy. takes place in a chemical change. Also, in a physical change, there is no change in the weight of the substance taken.
When we cut a cloth, there is only a change in the physical state because there is only the cutting of a cloth which does not involve any chemical change, shape or size change in the substance. Neither any light nor energy is being absorbed or released.

Note:
You should always remember that some physical changes are not temporary. They are permanent and cannot be reversed as they were in the original state. Though they’re called physical change because there is no change in shape, composition, size or colour. Neither the release nor absorb energy. Cutting off a cloth is an exact example of this statement.