Mid Check: Chemical Reactions
Quiz by Masen Huddleston
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- Q1
Dissolving sugar in tea is an example of a -
Substance 4
Substance 2
chemical Change
physical change
300s - Q2
Bubbles and fizzing can be seen instantly when baking soda is mixed with vinegar. The bubbles are evidence of which of the following?
Vinegar turns into alcohol when it is mixed with baking soda.
A precipitate is formed when baking soda and vinegar are mixed.
Baking soda dissolves in vinegar when they are mixed.
A gas is formed when baking soda and vinegar are mixed.
300s - Q3
A student mixes two clear liquids together. A solid white substance can be seen forming in the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids –
have combined to produce a precipitate, a new substance.
were pure substances before they were mixed.
are toxic and should be handled with extreme caution.
have been stored too long and are no longer good.
300s - Q4
Which of the following characteristics is shared by ALL chemical reactions?
Form new substances
Release heat energy
Produce a precipitate
Show a color change
300s - Q5
A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright yellow in color. The FIRST indication that a chemical change was taking place could be observed when –
the temperature of the liquid increased.
the crystals were added to the liquid.
the crystals dissolved in the liquid.
the color of the mixture changed.
300s - Q6
All of the following are evidence of a chemical change EXCEPT –
precipitate forms.
unexpected color change.
formation of a gas.
change in state of matter
300s - Q7
Which of the following is a chemical property of water?
Reacts with Sodium
Has a density of 1 g/mL
Dissolves sugar easily
Boils at 100 degrees Celsius
300s - Q8
What is the best evidence that a piece of burnt toast has gone through a chemical change?
Color change to black
Precipitate Formed
Gas Produced
Temperature Change
300s - Q9
Four substances were mixed with a clear liquid. The observations are recorded in the following table. Based on the observations, for which mixture is there best evidence that a new substance was formed?
Substance 2
Substance 4
Substance 1
Substance 3
300s
