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 9
A student mixes two colorless solutions and observes a yellow solid forming. What indicator of chemical change is this?
A student mixes two solutions and observes a temperature drop. What does this indicate?
A student notices a rotten egg smell after mixing two chemicals. What does this indicate?
A student observes that a solution becomes cloudy after mixing two clear liquids. What indicator of chemical change is this?
A student observes that a solution turns from blue to green after adding another chemical. What indicator of chemical change is this?
Describe one example of a chemical change that involves a change in color.
Describe one example of a chemical change that involves the evolution of gas.
Describe two indicators that a chemical change has occurred when magnesium ribbon is burned in air.
Explain why a change in temperature can be an indicator of a chemical change.
Explain why the evolution of gas is considered an indicator of a chemical change.
Explain why the formation of a precipitate is considered evidence of a chemical change.
When two solutions are mixed and the temperature of the mixture increases, what does this suggest?
When vinegar is added to baking soda, bubbles are observed. What does this indicate?
