Question

A physical change occurs when:____.

a. propane is burned for heat iron rusts.
b. glucose is converted into energy within your cells.
c. sugar is disolved in water

Answer 1

C

Step-by-step explanation:

When heated, the solution of sugar and water will leave residue which is sugar. Meanwhile propane is a fossil fuel and non renewable. In other words its also irreversible, so not a physical change. So is B.