3rd Summative Test
SCIENCE 10 – 4th Quarter
Name: __________________ Grade/Section: __________ Date: _____ Score: ____
I. Multiple Choices
Directions: Read and understand each item carefully. Choose the letter of the
best answer by encircling it.
1. In balancing a chemical equation, which of the following are you allowed to do?
a. add new substance
b. change superscripts
c. change subscripts
d. write coefficient
2. In a chemical reaction, what is the relationship between the total mass of the
reactants and the total mass of the products?
a. The mass of the products must be greater.
b. The mass of the reactants must be greater.
c. They must be equal.
d. There is no general relationship between the two.
3. According to the Law of Conservation of Mass, what is the total mass of the reacting
substances?
a. always equal to the total mass of the products.
b. always less than the total mass of the products.
c. always more than the total mass of the products.
d. sometimes more and sometimes less than the total mass of the products.
4. In a chemical equation, the symbol that takes the place of the words “reacts with” is?
a. arrow
b. equal sign
c. coefficient
d. plus sign
5. A student mixes two solutions, planning to produce carbon dioxide. Which of the
following is the best evidence that a chemical reaction is producing carbon dioxide?
a. color change
b. formation of a solid
c. formation of bubbles
d. temperature change
6.Which of the following demonstrates that a new substance can be formed from a
chemical reaction?
a. helium-filled balloon floating
b. milk souring
c. iron bending
d. water evaporating
7.Which of the following is the best evidence that rusting is a chemical property rather
than a physical property of iron?
a. Rust can form on any iron.
b. Rust cannot turn back into iron.
c. Rust does not look the same as iron.
d. Rust forms slowly.
8. In the given chemical reaction, what will be the correct count for the atoms of the
reactants? CH4(g) + 2O2(g) → CO2(g) + 2H2O(1),
a. 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms
b. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
c. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
d. 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
9. What will be the products when the given reaction is balanced? C3H8(g) + 5O2(g),?
a. 2CO2(g) + 3H2O(l)
b. 3CO2(g) + 4H2O(l)
c. 3CO(g) + 4H2O(l)
d. 4CO2(g) + 3H2O(l)
10. A given chemical equation provides the necessary information on what is happening
during chemical reaction. What does an arrow symbol pointing downward ( ) mean if
this is seen in the equation?
a. A gas was produced.
b. A precipitate was formed.
c. The container became hot.
d. The substance was dissolved in water.
11. How will the reaction be written when solid phosphorus is combined with oxygen
gas to form diphosphorus pentoxide?
a. P(s) + O2 (g) →PO2(g)
b. P(s) + O2 (g) → P2O5(g)
c. P(s) + O(g) → P2O5(g)
d. P2O5 → P2 (s) + O2(g)
12. A chemical reaction is possible when two or more substances interact under
favorable conditions. Which of the following is observed when baking soda is added to
vinegar?
a. change in temperature.
b. formation of a gas.
c. change in color.
d. Both A and B
13. What happens when some of the mass of a substance formed bubbles during a
chemical reaction?
a. absorbed into each other
b. nothing
c. escapes as a gas
d. stays the same
14. Which given set is correct when incorporating symbols in presenting chemical
equations?
a. (aq), dissolved in water
b. (L), liter
c. (g), grams
d. (t), temperature
15. What reactant is needed in the combustion reactions producing water and carbon
dioxide?
a. carbon
b. nitrogen
c. hydrogen
d. oxygen
16. How many atoms of hydrogen (H), sulfur (S), and oxygen (O) are there in sulfuric
acid (H2SO4)?
a. H-1, S-2, O-8
b. H-2, S-4, O-4
c. H-2, S-1, O-4
d. H-6, S-4, O
17. Which statement explains the Law of Conservation of Matter?
a. In a chemical reaction, matter can only be created.
b. In a chemical reaction, matter can only be destroyed.
c. Matter can neither be created nor destroyed in a chemical reaction.
d. Matter can either be created or destroyed in a chemical reaction.
18. Which of the following equations does not demonstrate the law of conservation of
mass?
a. 2Na + Cl2 → 2NaCl
b. NaOH + HCl → NaCl + H2O
c. SnCl + 2FeCl3 → 2FeCl2 + SnCl4
d. Zn + 2HCl → ZnCl2 + H2
19. What common element is needed in order to produce water and carbon dioxide?
a. carbon
b. nitrogen
c. hydrogen
d. oxygen
20. What type of reaction is represented by the following chemical equation? Pb(s) +
FeSO4(aq) → PbSO4(s) + Fe(s)
a. Combination
b. Single replacement
c. Decomposition
d. Double replacement
Prepared by: JHJ
