Which of the following is a chemical change?

Question

Quizplus · Accepted Answer

Paper burning involves a chemical reaction where the cellulose fibers in the paper are broken down into carbon dioxide, water vapor, and ash. This is a permanent change in the composition of the paper and therefore a chemical change. The other options listed are physical changes because they do not change the chemical composition of the substance. Water boiling and gasoline evaporating are changes in state, butter melting is a change in physical form, and sugar dissolving in water is a physical change where the sugar molecules are simply dispersed evenly throughout the water molecules.

Which of the Following Is a Chemical Change