Question

can physical and chemical change happen at the same time support your answer with illustrative example

Answer 1

When the candle burns,both physical and chemical changes occur:

Candle is made up of a solid block of wax with a wick embedded in it.

1️⃣ Physical Change:-

✔️When candle is lit, the heat of the flame melts the solid wax to liquid wax. This signifies a physical change from solid state to liquid state.

2️⃣ Chemical Change:-

✔️The wax acts as a fuel when we light the candle and is basically a chemical substance called carbon. The carbon combines with oxygen to form another chemical substance called carbon dioxide. Also the unburnt carbon is deposited as black substance called soot. This signifies a chemical change.

Answer 2

Yes, a chemical change can occur along with a physical change at the same time. For example, burning of candle. Wick of the candle as well as some wax burn due to combustion. This is a chemical change. At the same time wax melt ( liquefied) which is a physical change.