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Chemical Equation Review
Test Description: This is good practice
Instructions: Answer all questions to get your test result.
1) When an atom loses an electron, it forms a(n)
A
cation (positive)
B
anion (negative)
C
polyatomic ion
D
neutral atom
2) The charge on a chloride ion in AlCl3 is (the 3 should be a subscript)
A
3+
B
1+
C
1-
D
3-
3) Which pair has the same electron charge?
A
Cl- and Br
B
Cl- and Br-
C
Cl+ and Br
D
Cl and Br
4) When two flourine atoms share a pair of electrons, the bond that forms is a(n)
A
a sweet bond
B
ionic bond
C
covalent bond
D
polar covalent bond
5) AB + C --) AC + B is what type of reaction?
A
single displacement
B
decomposition
C
double displacement
D
synthesis
6) AB + CD --) AD + CB is what type of reaction?
A
double displacement
B
single displacement
C
decomposition
D
Combustion
7) AB --) A + B
A
Single displacement
B
Synthesis
C
Decomposition
D
Double displacement
8) CH4 + O2 --) CO2 + H2O
A
Synthesis
B
Double displacement
C
Combusition
D
Single displacement
9) Which of the following is a statement of the law of conservation of mass?
A
mass is destroyed but not created
B
mass is both created and destroyed depending on the chemical reaction.
C
mass is neither created nor destroyed.
D
mass is not created but destroyed
10) In what type of reaction does one reactant form two or more products?
A
double replacement
B
sythesis
C
decomposition
D
single replacement
11) What particle is transferred from one atom to another reaction in a redox reaction?
A
nucleus
B
neutron
C
proton
D
electron
12) How are reactions related to chemical bonds?
A
bonds in the products are broken, and bonds in the reactants are formed
B
bonds in the reactants are broken, bonds in the products are formed
C
bonds in both the reactants and products are broken
D
bonds are formed in both the reactants and the products
13) What type of reaction always releases energy?
A
oxidation-reduction
B
exothermic
C
endothermic
D
decomposition
14) In general, an increase in temperature
A
does not affect the reaction rate
B
decreases the reaction rate
C
increases the reaction rate
D
acts as a catalyst
15) The substances that undergo a change in a chemical reaction are called
A
bonds
B
reactants
C
products
D
atoms
16) The new substances that are formed as a result of the chemical reaction are called
A
products
B
bonds
C
reactants
D
atoms
*select an answer for all questions
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