Chemical Reactions
Review Quiz for Chemical Reactions Chapter Test
- 1.
Which of the following is a word equation?
- A.
Sodium oxide → sodium + oxygen
- B.
Sodium oxide decomposes to form sodium and oxygen
- C.
Na2O → Na + O2
- D.
2Na2O → 4Na + O2
Correct Answer
A. Sodium oxide → sodium + oxygen -
- 2.
In an exothermic reaction, heat is
- A.
Absorbed
- B.
Released
- C.
Destroyed
- D.
Conserved
Correct Answer
B. Released -
- 3.
The breaking down of a compound into simpler substances is
- A.
Displacement
- B.
Synthesis
- C.
Decomposition
- D.
Endothermic
Correct Answer
C. Decomposition -
- 4.
Each of the substances to the left of the arrow in a chemical equation is a
- A.
Catalyst
- B.
Product
- C.
Reactant
- D.
Coefficient
Correct Answer
C. Reactant -
- 5.
Numbers that precede (come before) symbols and formulas in a chemical equation are
- A.
Subscripts
- B.
Superscripts
- C.
Coefficients
- D.
Fractions
Correct Answer
C. Coefficients -
- 6.
Which of the following types of reactions results in a single product?
- A.
A synthesis reaction
- B.
A decomposition reaction
- C.
A combustion reaction
- D.
A single replacement reaction
- E.
A double replacement reaction
Correct Answer
A. A synthesis reaction -
- 7.
What does → signify?
- A.
"and"
- B.
"yields/produces"
- C.
Catalyst
- D.
Add heat
Correct Answer
B. "yields/produces" -
- 8.
What type of reaction is the following?CH4 + 2O2 → CO2 + 2H2O
- A.
Synthesis
- B.
Decomposition
- C.
Single replacement
- D.
Double replacement
- E.
Combustion
Correct Answer
E. Combustion -
- 9.
What type of reaction is the following?Cl2 + 2NaBr → 2NaCl + Br2
- A.
Synthesis
- B.
Decomposition
- C.
Single-replacement
- D.
Double-replacement
- E.
Combustion
Correct Answer
C. Single-replacement -
- 10.
What type of reaction is the following?2KI + Pb(NO3)2 → PbI2 + 2KNO3
- A.
Synthesis
- B.
Decomposition
- C.
Single-replacement
- D.
Double-replacement
- E.
Combustion
Correct Answer
D. Double-replacement -
- 11.
What coefficients would be added to balance the following equation?Fe + O2 → Fe2O3
- A.
2, 3, 1
- B.
4, 3, 2
- C.
It is already balanced
- D.
You wouldn't add a coefficient you would just change the subscripts
Correct Answer
B. 4, 3, 2 -
- 12.
What coefficients would balance the following equation?Sr + H2O → Sr(OH)2 + H2
- A.
1, 4, 2, 2
- B.
2, 4, 2, 4
- C.
1, 2, 1, 1
- D.
It is already balanced
Correct Answer
C. 1, 2, 1, 1 -
- 13.
Which of the following is NOT an observable clue that a chemical reaction has occurred?
- A.
Release of a gas
- B.
Odor change
- C.
Precipitate formation
- D.
Mixing two reactants
Correct Answer
D. Mixing two reactants -
- 14.
An insoluble substance formed from two solutions is a
- A.
Reactant
- B.
Precipitate
- C.
Compound
- D.
Product
Correct Answer
B. Precipitate -
- 15.
In a double-replacement reaction
- A.
The reactants are usually one metal and one nonmetal
- B.
One of the reactants is often water
- C.
The reactants are generally two ionic compounds
- D.
Energy is always produced
Correct Answer
C. The reactants are generally two ionic compounds -
- 16.
In order for the reaction F2 + NaCl → Cl2 + NaF to occur, which of the following must be true?
- A.
F must be above Na on the activity series
- B.
F must be above Cl on the activity series
- C.
Na must be above F on the activity series
- D.
Cl must be above F on the activity series
Correct Answer
B. F must be above Cl on the activity series -
- 17.
Which compound would decompose to form Mg and O2?
- A.
MgO2
- B.
MgO
- C.
Mg2O2
- D.
Mg and O2
Correct Answer
B. MgO -
- 18.
Among the elements listed, which could replace all of the rest in a single replacement reaction?
- A.
Li
- B.
Mg
- C.
Cu
- D.
Ag
- E.
Ba
Correct Answer
A. Li -
- 19.
In a chemical reaction, the total mass of the substances before the reaction compared to the total mass of the substances after the reaction is
- A.
Usually smaller
- B.
Usually greater
- C.
Equal
- D.
Sometimes greater, sometimes smaller
Correct Answer
C. Equal -
- 20.
What does (aq) designate?
Correct Answer
aqueous
dissolved in water - 21.
What does (g) stand for?
Correct Answer
gas - 22.
What would be the products of the following decomposition reaction?LiCl →
- A.
Li + Cl
- B.
LiCl
- C.
Li + Cl2
- D.
None of the above
Correct Answer
C. Li + Cl2 -
- 23.
In a combustion reaction between a hydrocarbon and oxygen, the products are always?
- A.
A synthesis reaction
- B.
Carbon dioxide and water
- C.
Oxygen
- D.
Hydrogen, carbon and oxygen
Correct Answer
B. Carbon dioxide and water -
- 24.
In a combustion reaction, ______________ is always one of the reactants.
- A.
O
- B.
O2
- C.
CO2
- D.
H2O
Correct Answer
B. O2 -
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Current Version
-
Mar 21, 2022Quiz Edited by
ProProfs Editorial Team -
May 27, 2009Quiz Created by
Wack213
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