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Q.

Burning wood is what changes?


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a

Chemical   

b

Physical   

c

Both 1 & 2   

d

None of these 

answer is A.

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Detailed Solution

When a substance undergoes a chemical reaction or metamorphosis to become one or more other compounds. This is the chemical transformation process. When wood burns, it chemically transforms into carbon dioxide and leaves an ashy behind. It is impossible to turn these ashes back into wood. The alteration is therefore chemical.
 
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