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Q.

Is it true that burning of a candle is a chemical change as well as a physical change?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
Chemical change is said to occur when a new substance is formed. Chemical changes are irreversible in nature. Change in the size, form, state of a matter is called physical change. When a candle is burned then the wax melts and the size of candle decreases, thus that is a physical change. The wax acts as a fuel and flame is produced by burning of wax which evolves carbon dioxide, that is a chemical change. Therefore, burning of a candle is a chemical change as well as a physical change.
              
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