Question

Is the burning of a candle a chemical chage or physical change ? explain with reason

Answer 1

It is physical as well as chemical change.

The wax first melts. It is physical change

It then burns and evaporates. This is chemical change

Answer 2

Hey friend here is your answer.....


Answer :



The burning of a candle involves a physical as well as a chemical change .


Reason :


1. The wax under the wick melts . The molten wax flows down and solidifies . These are changes in state and , therefore , physical changes .


2. A part of the molten wax that vaporises burns to form carbon dioxide and water vapour . The burning of wax is a chemical change .



$\bold{physical \: change \: }$


1. A physical change is temporary .

2. A physical change is reversible .

3. No new substances are formed after a physical change .

4. After a physical change, the mass of the substances remains unaltered .

5. Example : Melting of ice , evaporation of liquid , freezing of water etc .



$\bold{chemical \: change}$

1. A chemical change is permanent .

2. A chemical change is Irreversible .

3. New substances are formed after a chemical change .

4. The mass of the individual substance undergoing a chemical change is altered .

5. Example : Photosynthesis , fermentation , respiration etc .


$\bold{hope \: it \: helps \: you \: ...}$