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Which of these is a demonstration of a chemical change?  
A.
ice melting into water
  
B.
wood becomes charred and black from burning
  
C.
water evaporates from a sugar solution, leaving behind sugar crystals
  
D.
a balloon suddenly popping
Please explain the answer :)


Sagot :

The answer would be B. Wood becomes charred and black from burning. This is because A and C are both simply water changing state, therefore these are both physical changes. D is simply air escaping so there is no chemical change. In B, however, the wood is being burned in a combustion reaction which causes a chemical change.

Answer:

The answer is B.wood becomes charred and black from burning  

Explanation: