Question

What is the change taking place in the following processes ?

• A. Irreversible, physical change
• B. Irreversible, chemical change
• C. Reversible, physical change
• D. Reversible, chemical change

Answer 1

The correct option is C Reversible, physical change

The changes that could be reversed are called reversible changes. If the composition of the original substance remains unchanged and no new substance is formed, then it is called physical change.

Continuous supply of heat to ice will cause the ice to melt into water. Further supply of heat will convert the water to steam. However, on cooling, we find that the steam can be converted into water and then into ice.

Since we see that there is only a change in the physical state of the water and that this entire process is reversible, this is a reversible physical process.