Question

Sharpening of a pencil is a type of:

• A. Chemical and reversible change.
• B. Physical and reversible change.
• C. Chemical and irreversible change.
• D. Physical and irreversible change.

Answer 1

The correct option is D

Physical and irreversible change.

A change in which physical properties of a substance like shape, size, state, etc changes is called a physical change. A physical change is generally reversible and there is no formation of a new substance. Sharpening of a pencil is a physical change since shavings that are produced are not new product. It is also an irreversible change because shavings obtained cannot be converted back to the original pencil itself.