which of these changes is an example of a chemical change?\nan iron rod being turned into a…

which of these changes is an example of a chemical change?\nan iron rod being turned into a horseshoe\nmelting ice\nelectrolysis of water forming hydrogen and oxygen\nevaporation of water from a lake or ocean

which of these changes is an example of a chemical change?\nan iron rod being turned into a horseshoe\nmelting ice\nelectrolysis of water forming hydrogen and oxygen\nevaporation of water from a lake or ocean

Answer

Brief Explanations:

A chemical change results in new substances being formed. In the electrolysis of water, water ($H_2O$) is decomposed into hydrogen ($H_2$) and oxygen ($O_2$), which are new substances. Turning an iron rod into a horseshoe is a physical - shape change. Melting ice and water evaporation are physical state - changes (solid to liquid and liquid to gas respectively) without new substances being formed.

Answer:

electrolysis of water forming hydrogen and oxygen