A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction?
A Heat is added to the sugar crystals.
B The sugar melts and becomes a liquid.
C The temperature of the sugar increases.
D Gas is produced as the sugar turns black.

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Answers

2014-09-07T11:47:48+08:00
My answer to that is letter B. The chemical reaction is the transformation of solid to liquid form that is illustrated in the given question.
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