Question

Hi guys !

komal here

answer my question..


Burning of candle is an chemical change or physical change.

justify your answer.

Answer 1

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 .



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

Answer 2

$\huge \mathcal{HELLO}$

$\tt\underline{YOUR \: ANSWER:}$

When is candle burns, both physical and chemical changes take place.

Physical change -> melting of wax

Chemical change -> Burning of wax

Eating of food is another example where both physical and chemical change occurs simultaneously.

Physical change -> Breaking of larger food particles into smaller particles.

Chemical change -> Digestion of food

$\boxed{Hope \: its \: helpful.....}$