Question

The change in which a new substance is formed.

Answer 1

• Chemical change: A change that alters the specific properties of a substance by bringing about a change in its molecular composition, followed by a change in its state, is called a chemical change.
• New substances with entirely new properties are formed.
• A chemical change cannot be easily reversed.
• There is usually a change in weight during a chemical reaction.
• A lot of heat is usually given off or absorbed during a chemical change.
• For example - Magnesium on burning forms an entirely new substance i.e. magnesium oxide.

Hence, The chemical change in which a new substance is formed.