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Question

We observe that some portion of wax (in candle) melts and other portion of it is used in producing heat and light.
Statement A: The melting of wax is a physical change
Statement B: The burning of wax for the production of heat and light is a chemical change.
State which of the statement(s) is/are true.



A

True

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B

False

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C

Only Statement A is true

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D

Only Statement B is true

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Solution

The correct option is A

Both Statement A and Statement B are true


When we burn a candle, wax melts and hence the physical state of wax changes from solid to liquid. As the wax burns to produce flame, it combines with the atmospheric oxygen and changes to carbon dioxide, heat and light. Hence, both the statements are correct.


Chemistry

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