Question

Which of the following will result in a chemical change?

A. Melting ice to obtain water
B. Drying wood in a shed
C. Burning coal in a furnace
D. Evaporating alcohol into vapor

Answer 1

A chemical change is when it changes the substance itself. It breaks or forms bonds, therefore, you cannot bring it back to the original substance.

Burning coal in a furnace. Because when you burn something, you cannot make it what it used to be.

Final answer:- C. Burning coal in a furnace.

Answer 2

The correct answer is C.

Burning is a chemical change. It's a chemical process that includes oxygen.

All the other options are a change of state: form solid to liquid, or from liquid to gas (as in the last one).