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