Question

13 (xii) Against each change described below, write P for physical change and C for chemical change.

Sam burnt the toast.

Answer 1

• Sam burnt the toast is a chemical change.
• When the toast is burnt, it changes its properties and cannot be changed back to its original state.
• It is an irreversible change.
• Chemical changes are those in which new substances are formed. The properties of the new substances formed are very different from the original substances.
• Chemical changes are usually irreversible.