Question

Observe the venn diagram given below.

Which of the following process could 'X' be?

• A. The rusting of iron
• B. The burning of wood
• C. The melting of wax
• D. Milk changing to curd

Answer 1

The correct option is C

The melting of wax

On heating, candle wax melts and forms liquid wax. Melting of wax is a physical, reversible change as no new products are formed and on cooling it turns into solid wax. While others undergo irreversible chemical change.