Chemistry

Question

Which of the following will result in a chemical change?
A. Melting ice to obtain water
B. Drying wood in a shed
C. Burning coal in a furnace
D. Evaporating alcohol into vapor

2 Answer

  • The correct answer is C.

    Burning is a chemical change. It's a chemical process that includes oxygen.

    All the other options are a change of state: form solid to liquid, or from liquid to  gas (as in the last one).
  • A chemical change is when it changes the substance itself. It breaks or forms bonds, therefore, you cannot bring it back to the original substance.

    Burning coal in a furnace. Because when you burn something, you cannot make it what it used to be. 

    Final answer:- C. Burning coal in a furnace. 
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