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Q.

Burning of wood is which type of change, find out in the following ?


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a

reversible

b

physical change

c

chemical change

d

all of these 

answer is C.

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Detailed Solution

        Burning of paper and wood is considered as chemical change.
        On heating paper or wood, ash is obtained which has a different chemical composition than that of paper and wood.
        We know that we can't obtain paper back again from ash.
 
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