Question

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

Answer 1

Melting of wax is physical change.

In melting of wax, only the state of wax changes from solid to liquid.

It is a reversible reaction and no new substance is formed.

Burning of candle is both physical and chemical change.

When the candle burns, the wax slowly melts which freezes after some time (Physical change).

Burning of wick is a chemical change as it involves combustion.

Answer 2

Answer:

because it is the temporary change in which no new substance is formed and the chemical composition of matter remains same even though it physical properties like colour,state,size etc might change ,is termed as a physical change ..

Explanation:

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