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 and

D

None of these

Medium

Solution

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Correct option is B)

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.

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