chemical physical magnetic electric
I gave my students this multiple choice question: In a classroom demonstration, a teacher pours sulfuric acid on some granulated sugar in a beaker. The sugar turns yellow and then black. Smoke rises and a strong smell is released. This demonstration is an example of what kind of change?

Only one answer is correct among these 4 choices:
- chemical
- physical
- magnetic
- electric

Could you tell me which one is correct?

chemical