Indicators of Chemical Change
Chemistry ⇒ Chemical Reactions and Equations
Indicators of Chemical Change starts at 7 and continues till grade 12.
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See sample questions for grade 12
A student adds hydrochloric acid to zinc and observes the release of hydrogen gas. Which indicator of chemical change is being observed?
A student mixes two clear solutions and observes a yellow color forming. What indicator of chemical change is being observed?
A student mixes two colorless solutions and observes a cloudy white substance forming. What indicator of chemical change is this?
A student observes a temperature increase when two chemicals are mixed. What type of reaction is likely occurring?
A student observes that mixing vinegar and baking soda produces bubbles. What does this indicate?
Describe how the change in odor can be used to identify a chemical change, giving an example.
Describe how the formation of a precipitate can be used to identify a chemical change in a reaction.
Describe two differences between a physical change and a chemical change based on observable indicators.
Explain why a change in temperature can be considered an indicator of a chemical change.
Explain why dissolving sugar in water is not considered a chemical change.
Explain why the change in taste can be considered an indicator of a chemical change, using an example.
Explain why the rusting of iron is considered a chemical change.
