Question

100 POINTS HELP Which of these changes is an example of a chemical change?

A. melting ice
B. electrolysis of water forming hydrogen and oxygen
C. an iron rod being turned into a horseshoe
D. evaporation of water from a lake or ocean

Answer 1

B because electrolysis, process by which electric current is passed through a substance to effect a chemical change

Answer 2

Answer: B. Electrolysis of water forming hydrogen and oxygen

Explanation:

I believe it would be B. Electrolysis of water forming hydrogen and oxygen since melting ice is simply just a physical change from a solid to a liquid, shaping an iron rod into a horseshoe is also a physical change since it is still the same material just in a different shape, and evaporation of water is again also a physical change since it is changing its physical state.