Question

Chemical changes are usually irreversible.

• A. True
• B. False

Answer 1

The correct option is A True

• Chemical change: A permanent change in which new substances are formed whose chemical and physical properties are completely different from that those of the original substance.
• Example: Souring of milk, ripening of fruit, rusting of iron, etc.

Characteristics of chemical change:

• Change is permanent and irreversible.
• One or more new substance is formed.
• composition of the original substance does not remain the same.
• The heat or light may be produced or consumed during the reaction.
• The exchange of energy takes place during the reaction.

Hence the given statement i.e. chemical changes are usually irreversible is true.