Question

melting of wax is a physical change but burning of wax is a chemical change explain​

Answer 1

in melting wax can be again use but in burning wax cannot be again use

Answer 2

$\huge\sf\red{Answer}$

≫ We know that the change of a substance form one State to another is not considered as a chemical change and can be reversed. So here the wax of the candle just changes from solid to liquid state, but later on can be reversed back to solid state on cooling. And hence Melting of wax is a physical change.

≫ When a candle burns the wax that is present near the wick of the candle gets absorbed during the process of buying and of course can't be reversed back to old form and hence is considered as a chemical change.

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$\large\sf\bullet\pink{Additional \ Information}$

$\sf\circ\green{Physical \ change}$

◕ In a Physical Change no new Substituting is formed and is just changed from one form to the other. And the new substanse formed can be reversed to its old state.

Eg - Melting of ice, Evaporation etc...

$\sf\circ\orange{Chemical \ change}$

◕ In a Chemical Change a new substance is formed. And also the new substance formed can't be reversed to its old state.

Eg - Cooking,Burning etc...

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