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A solid is placed in a solution. Which observation most likely indicates that a chemical reaction has occurred?

AThe size of the solid has rapidly decreased.
BThe color of the solution has not changed.
CThe solid has bubbles forming on its surface.
DThe temperature of the solution stays the same.

Verified Answer :

Answer;

C) The solid has bubbles forming on its surface.

Explanation;

-Chemical reactions involves the reaction of reactants that involves rearrangement of their structure resulting to the formation of new substances.

-There are a number of common indicators that are used to show that a chemical reaction has taken place, namely;

  • Change of color
  • Change of Odor
  • Change in temperature or energy
  • Formation of precipitate
  • Effervescence or formation of gas bubbles.


The answer is probably C

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