Question

How do the following changes different from one another? Explain with details.
(a) Melting of wax
(b) Burning of wax​

Answer 1

Answer:

A) 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).

B) On burning candle, wax melts which is a physical change. Also, the wax near the flame burns and gives CO2, soot, light and heat which is a chemical change. Hence, burning of candle is a physical as well as chemical change.

Explanation:

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Answer 2

Explanation:

a) melting of wax refers to the physical change of wax ,in the melting of wax only the physical state of wax changes. this type of change is reversable

b)burning of wax refers to the chemical change of wax ,in this burning of wax the chemical properties of wax are changing. This type of change is non-reversable

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