Which scenarios are definite signs that a chemical reaction has occurred? (Select all that apply)...
Question:
Which scenarios are definite signs that a chemical reaction has occurred? (Select all that apply)
a. Water is heated and releases a gas.
b. Blue and yellow paint mix to make green paint.
c. A piece of iron begins to rust.
d. Two liquids are mixed together and release a light.
What is a Chemical Reaction?:
A chemical reaction is characterized by a change in composition of reacting components while a physical change has just a difference in the smell,color or appearance of a substance without a change in internal composition.
Answer and Explanation: 1
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View this answer{eq}a){/eq} Here water is just boiled to form steam which has just a change in temperature while internally it is still the same , i.e, ...
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Chemical Change: Signs & Evidence
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Chapter 10 / Lesson 20
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Learn what chemical changes are and see the evidence and signs of chemical changes, as well as how they can serve as indicators of a chemical reaction.
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