Question

multiple-choice question
can a chemical change be undone or reversed?
no
yes

Explanation:

A chemical change results in the formation of new substances with different chemical properties. Once new substances are formed, it is extremely difficult or often impossible to reverse the process to get back the original substances in their exact initial form. For example, when wood burns (a chemical change), it forms ash, smoke (gases like carbon - dioxide, water vapor etc.), and it's not possible to turn the ash and gases back into the original piece of wood.

Answer:

No