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- 1. Multiple Choice
You know that a chemical reaction is occurring here because you see __________________ . (Pick 3)
purple color
smoke
ice formation
fire
a yellow precipitate
- 2. Multiple Choice
In this chemical reaction, what was the first evidence that you saw?
Production of fire
Production of light
Production of purple smoke
Production of white powder
- 3. Multiple Choice
The result of the experiment between Iodine and Aluminum was the production of __________________.
clear liquid.
a white powder.
yellow precipitate.
bubbles.
- 4. Multiple Choice
When zinc reacted with hydrochloric acid, what was the result of this reaction?
a white powder
a blue liquid
a brown precipitate
a gas
- 5. Multiple Choice
Reactants are the chemicals that are present at the beginning of an experiment. Reactants react together to make the product.
We can know that a chemical reaction is occurring when we see ______.
that the product looks just like the reactants.
nothing new.
that the product looks different from the reactants.
- 6. Multiple Choice
Which of the following is evidence of a chemical reaction?
Tearing paper.
Change in color.
Production of a gas.
Change in temperature.
Production of a precipitate.
- 7. Multiple Choice
How many Carbons are present on the reactant side?
1
2
3
4
- 8. Multiple Choice
A chemical change is different than a physical change because in a chemical change
chemicals are used
molecules do not physically touch
a new substance is formed and in a physical no new substance is formed
the change can be seen but in a physical change it cannot
- 9. Multiple Choice
Which of the following 2 are chemical reactions?
sugar dissolving in water
water turning into steam
burning wood
mixing baking soda and vinegar
tearing paper
- 10. Multiple Choice
How many Hydrogens are on the product side of this chemical equation?
1
2
3
4
- 11. Multiple Choice
Why are chemical equations always balanced? Select ALL that apply.
Matter cannot be created.
Matter cannot be destroyed.
Matter can only be rearranged/conserved.
Matter doesn't matter.
- 12. Multiple Choice
The smallest particle of an element; made of electrons, protons, and neutrons
Atoms
Elements
Molecules
Products
- 13. Multiple Choice
This change is a
chemical reaction
physical change
musical change
all answers are correct
- 14. Multiple Choice
This image shows a
chemical reaction
physical change
musical change
all of these answers are correct
- 15. Multiple Choice
The reactants in the image above are:
CH4 and 2 O2
2 H2O and CO2
All of these are reactants
All of these are products
- 16. Multiple Choice
The products in the image above are:
CH4 and 2 O2
2 H2O and CO2
All of these are reactants
All of these are products
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