Which change is chemical

Question

A. Water freezing: liquid water becoming solid water
B. water undergoing electrolysis: liqiud water becoming oxygen and hydrogen molecules
C. Water boiling: solid water becoming gaseous water
D. water evaporating: liquid water becoming gaseus water

Answer 1

The change that is chemical from the options provided is:

B. Water undergoing electrolysis: liquid water becoming oxygen and hydrogen molecules.

This process involves breaking the chemical bonds in water (H₂O) to produce separate elements (oxygen and hydrogen), which is a chemical change.

The other options (A, C, and D) involve physical changes, where the substance remains the same chemically despite a change in state (solid, liquid, or gas).