Question

A change can be reversible and irreversible at the same time.

• A. True
• B. False

Answer 1

The correct option is A True

1. Reversible changes - When a change in a substance can be reversed by reverting to original conditions, it is said to be a reversible change. Example - Melting of ice or wax.
2. Irreversible change - When a substance can not be brought back to its original state after a change to original conditions, it is said to be an irreversible change. Example - Souring of milk.

It is possible for the same material to undergo both reversible and irreversible changes.

1. For example:

• Reversible: If we slowly melt down the wax, it will become solid again after cooling.
• Irreversible: If we burn a wax candle most of the wax will either evaporate or become carbon dioxide and other gases

Hence the given statement is true