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WorksheetsChemical Bonds and Reactions CA Review
Total questions: 33
Worksheet time: 17mins
Name
Class
Date
1.
What are the symbols for the 2 elements that make up the compound Iron Oxide?
a)
I and Ox
b)
Ir and O
c)
Fe and Ox
d)
Fe and O
2.
How many atoms of sulfur are in the compound Na2SO4 ?
a)
4
b)
1
c)
2
d)
0
3.
What is the formula for Methane?
a)
H2O
b)
CH4
c)
CO2
d)
CH3
4.
What happens to the reactants in a synthesis reaction?
a)
They are broken down into smaller components
b)
They are destroyed
c)
They combine to form a new compound
d)
They are dissolved
5.
Why do atoms bond with each other?
a)
To become more stable
b)
To become more unstable
c)
To get more protons
d)
To become larger compounds
6.
Which type of bond holds together particles in a crystal?
a)
Covalent Bond
b)
James Bond
c)
Hydrogen Bond
d)
Ionic Bond
7.
What subatomic particles are directly involved in chemical bonding?
a)
Protons
b)
Neutrons
c)
Valence electrons
d)
Noble gases
8.
What type of bond involves atoms donating and taking away electrons?
a)
Ionic Bond
b)
Covalent Bond
c)
Metallic Bond
d)
Hydrogen Bond
9.
What are atoms doing when they are in a covalent bond?
a)
They donate and take electrons
b)
They share electrons
c)
They lose electrons
d)
They gain electrons
10.
How are ionic and covalent compounds alike?
a)
They create ions
b)
They donate electrons
c)
They cannot be broken down into smaller particles
d)
They fill outer electron levels
11.
Which is an example of a chemical change due to a chemical reaction?
a)
Sugar dissolving
b)
Nails rusting
c)
Chopping wood
d)
Water evaporating
12.
Which form of energy is released or absorbed in a chemical reaction?
a)
Heat energy
b)
Kinetic Energy
c)
Potential Energy
d)
Light Energy
13.
Which of the following is a clue that a chemical reaction has occurred?
a)
A yellow powder dissolved in water
b)
A clear liquid evaporated over heat
c)
Two liquids are mixed and bubbles form
d)
A silver metal sinks to the bottom of a beaker
14.
What happens during an exothermic reaction?
a)
Energy is destroyed
b)
Energy is released
c)
Energy is created
d)
Energy is used to break bonds
15.
What is true about all balanced chemical equations?
a)
The mass of the products will equal the mass of the reactants.
b)
The mass of the products will be greater than the mass of the reactants.
c)
The temperature of the products will equal the temperature of the reactants.
d)
The subscripts can be changed
16.
Why is the mass of the reactants sometimes greater than the mass of the products?
a)
Because the reaction was exothermic
b)
Because the products are covalently bonded
c)
Because a gas was produced
d)
Because a metal was produced
17.
How can you tell if an exothermic reaction has occurred?
a)
If the final products are colder than the reactants
b)
If the final products are warmer than the reactants
c)
If energy is absorbed
d)
If no heat is released
18.
Is this equation balanced?
2Al + 3CuCl2 → 2AlCl3 + 3Cu
2Al + 3CuCl2 → 2AlCl3 + 3Cu
a)
Yes
b)
No
19.
What type of reaction is this?
a)
Decomposition
b)
Synthesis
c)
Single Replacement
d)
Combustion
20.
What is the general formula for a double displacement reaction?
a)
A + B → AB
b)
AB + C → AC + B
c)
ABC → A + B + C
d)
AB + CD → AC + BD
21.
What is the general formula for a single displacement reaction?
a)
A + B → AB
b)
AB + C → AC + B
c)
ABC → A + B + C
d)
AB + CD → AC + BD
22.
What is the general formula for a synthesis reaction?
a)
A + B → AB
b)
AB + C → AC + B
c)
ABC → A + B + C
d)
AB + CD → AC + BD
23.
Which process involved in the digestion of food is a physical change?
a)
Acids in the stomach break down fats
b)
Teeth chewing up a sandwich
c)
Saliva dissolving starches
d)
Bacteria break down lactose in the intestines
24.
Which of the following is a property of a nonmetal?
a)
Hard shiny surface
b)
Good conductor of heat
c)
Can be bent into different shapes
d)
Poor conductor of electricity
25.
The atomic number is equal to the number of ___________ and___________.
a)
Neutrons and protons
b)
Protons and electrons
26.
What is the volume of the rock?
a)
40 mL
b)
70 cm3
c)
10 cm3
d)
30 mL
27.
What does this graph tell you?
a)
As pressure decreases, volume increases
b)
As volume increases, pressure increases
c)
As volume decreases, pressure increases
d)
This graph is incorrect
28.
What is the formula for Carbon Dioxide?
a)
2CO
b)
C1O2
c)
Carbon and Oxygen
d)
CO2
29.
How many atoms of carbon are in the following equation? CH3CH2Br
a)
1
b)
2
c)
3
d)
4
30.
If a symbol in a formula has no subscript, how many atoms if that element are represented?
a)
0
b)
1
c)
10
d)
12
31.
Covalent bonds (sharing of electrons) form between what type of elements?
a)
Metals
b)
Nonmetals
c)
Noble Gases
d)
Metals and Nonmetals
32.
Ionic bonds (transferring of electrons) form between what types of elements?
a)
Metals
b)
Nonmetals
c)
Noble Gases
d)
Metals and Nonmetals
33.
How many atoms are in the reactants?
2Na(s) + Cl2(g) → 2NaCl(s)
2Na(s) + Cl2(g) → 2NaCl(s)
a)
2
b)
4
c)
6
d)
8
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