Question

Burning of candle involves the following change/changes
(A) physical
(B) chemical
(C) both (A) and (B)
(D) none of these

Answer 1

Hey friend here is your answer....


Answer :


Option C) both A and B is your 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

Hey there!!!

Option C is your answer

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