Question

Classify the following as physical or chemical change.

Metallic sodium is soft enough to be cut with a knife.

• A. Chemical
• B. Physical
• C. Both $A$ and $B$
• D. None of these

Answer 1

Answer: (B)

Physical

Physical Change:

• It is a process in which the substance experiences a change in its physical properties like shape, size, colour, volume, appearance, state etc.
  
• There is no change in its chemical composition.

When sodium metal is cut, there are only changes in its shape. Therefore, it is a physical change.