Question

When we burn a candle, which of the following changes occur?

• A. Physical Change
• B. Chemical Change
• C. Both Physical and Chemical
• D. None of these

Answer 1

The correct option is C

Both Physical and Chemical

Both physical and chemical changes occur. Upon heating, the wax first undergoes the process of melting followed by heating.

• Here, melting is a physical change as the melted wax can again be obtained as solid wax upon the removal of heat.
• Burning of a wick is a chemical change as it involves combustion. Also once the wax has been burnt, it cannot be obtained back in its original form. It converts into wax vapour.