An example of a physical change is 

Ferdinand001

1 year ago

correct

A physical change is a change in the form or state of a substance without changing its chemical composition. In the liquefaction of liquids, a liquid changes its state (e.g., from gas to liquid) but remains the same substance chemically.

Here's why the other options are not physical changes:

A. Slaking of lime: This is a chemical change, as lime reacts with water to form slaked lime (calcium hydroxide).

C. Dissolution of limestone in acid: This is a chemical change because limestone reacts with acid to form new compounds.

D. Rusting of iron: This is a chemical change, as iron reacts with oxygen to form iron oxide (rust).