Worksheets7th Grade 9 Weeks test review
Total questions: 63
Worksheet time: 2hrs 12mins
Name
Class
Date
1.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
2.
How many Hydrogen (H) atoms are in NH3O5
a)
3
b)
4
c)
5
d)
1
3.
In the following equation, what are the reactants?
CaO + 3 C → CaC2 + CO
CaO + 3 C → CaC2 + CO
a)
CaO + 3 C
b)
CaC2 + CO
c)
3 C → CaC2
d)
the stuff on the outside
4.
In the following equation, what are the products?
HCl + Zn → H2 + ZnCl2
HCl + Zn → H2 + ZnCl2
a)
HCl + Zn
b)
H2 + ZnCl2
c)
Zn → H2
d)
the stuff on the outside
5.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
6.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
7.
What is the Law of Conservation of Mass?
a)
It states that no matter can be created or destroyed.
b)
It states that no energy can be created or destroyed.
c)
It states that matter can be created or destroyed.
d)
It states that no sound can be created or destroyed.
8.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
9.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
10.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
11.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
12.
Balance this equation:
MgCl2 --> Mg4+ Cl2
MgCl2 --> Mg4+ Cl2
a)
It's already balanced.
b)
4MgCl2 --> Mg4+ 4Cl2
c)
4MgCl2 --> Mg4+ 5Cl2
13.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
14.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
15.
How many Mn atoms are found in the following compound?
3Cr(MnO4)6
3Cr(MnO4)6
a)
3
b)
4
c)
6
d)
18
16.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
17.
How many aluminum atoms are in Al2(SO4)3?
a)
1
b)
2
c)
3
d)
4
18.
Read the following chemical formula: C6H12O6. How many hydrogen atoms are in the formula?
a)
12
b)
6
c)
4
19.
How many Iron (Fe) atoms are in this chemical formula?
a)
2 iron atoms
b)
6 iron atoms
c)
5 iron atoms
d)
4 iron atoms
20.
This appears on the left side of a chemical formula, and represents how many molecules there are.... What is highlighted in yellow?
a)
Atom
b)
Subscript
c)
Molecule
d)
Coefficient
21.
How many oxygen atoms are in this chemical formula?
a)
6 oxygen atoms
b)
2 oxygen atoms
c)
3 oxygen atoms
d)
4 oxygen atoms
22.
Balance this equation...
H2 + Cl2 --> HCl
H2 + Cl2 --> HCl
a)
It is balanced
b)
3H2 + Cl2 --> 6H2Cl
c)
H2 + Cl2 --> 2HCl
23.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
24.
Identify the numbers that would correctly balance the equations
a)
1, 1, 1, 1
b)
1, 1, 1, 2
c)
1, 2, 1, 1
d)
1, 2, 1, 2
25.
Identify the numbers that would correctly balance the equations
a)
1, 1, 1
b)
1, 1, 2
c)
1, 2, 1
d)
2, 1, 2
26.
Identify the numbers that would correctly balance the equations
a)
1, 1, 1
b)
2, 3, 2
c)
1, 2, 1
d)
2, 1, 2
27.
Identify the numbers that would correctly balance the equations
a)
1, 3, 2, 3
b)
1, 3, 1, 3
c)
2, 3, 2, 3
d)
1, 3, 2, 2
28.
Identify the numbers that would correctly balance the equations
a)
2, 1, 1, 4
b)
1, 3, 1, 3
c)
2, 1, 2, 4
d)
1, 2, 2, 4
29.
Identify the numbers that would correctly balance the equations
a)
2, 1, 1, 4
b)
1, 3, 1, 3
c)
2, 6, 2, 3
d)
1, 2, 2, 4
30.
Element or compound?
H2O
H2O
a)
Element
b)
Compound
31.
Element or compound?
O2
O2
a)
Element
b)
Compound
32.
How many aluminum atoms are in Al2(SO4)3?
a)
1
b)
2
c)
3
d)
4
33.
diphosphorus pentoxide
a)
P2O5
b)
PO5
c)
P5O2
d)
P2O6
34.
SiCl4
a)
silicon tetrachloride
b)
silicon quadchloride
c)
monosilicon tetrachloride
d)
silicon chloride
35.
silicon dioxide
a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
36.
phosphorus trichloride
a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
37.
name the following ionic compound: NaF
a)
nitrogen fluorine
b)
sodium fluoride
c)
nitrogen fluoride
d)
sodium fluorine
38.
What does the symbol He stand for?
a)
Helium
b)
Hydrogen
c)
Oxygen
d)
Beriyllium
39.
This element has the symbol Na.
a)
potassium
b)
sodium
c)
narwhalium
d)
lithium
40.
This is the symbol for the element potassium.
a)
K
b)
P
c)
Po
d)
Ka
41.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
42.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
43.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1,
d)
4, 3, 1, 2
44.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup
d)
plastic bottle
45.
Which box has a higher density?
a)
Box A
b)
Box B
c)
cannot be determined
d)
they are the same
46.
Helium balloons rise on earth because
a)
helium is less dense than air
b)
helium is more dense than air
c)
helium is cooler than air
d)
helium is warmer than air
47.
Why do some substances float on water?
a)
they are warmer than water
b)
they are cooler than water
c)
they are more dense than water
d)
they are less dense than water
48.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
49.
Is glass breaking a chemical or phyiscal change?
a)
chemical
b)
physical
50.
Baking a cake by mixing flour, sugar, chocolate powder, eggs, and milk, and then heating them in the oven.
a)
Chemical Change
b)
Physical Change
51.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
52.
which one is the definition of chemical property?
a)
a property or characteristic of a substance that is observed during a reaction where the chemical composition of a substance is changed
b)
any change that results in the formation of new chemical substances
c)
combustibility
53.
what is the definition of physical change?
a)
any change that results in the formation of new chemical substances.
b)
rusting
c)
changes affecting the form of a chemical substance, but not its chemical composition.
d)
any property that is measurable, whose value describes a state of a physical system
54.
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
a)
evaporation; chemical change
b)
condensation; physical change
c)
evaporation; physical change
d)
condensation; chemical change
55.
what happens when water freezes?
a)
ice is formed; chemical property
b)
cold water is formed; physical change
c)
ice is formed; physical change
d)
cold water is formed; chemical change
56.
which of these example is a physical change?
a)
b)
c)
d)
57.
Which of the following examples is evidence of a physical change?
a)
Ice melts
b)
Silver tarnishes
c)
Bicycle rusts
58.
Which of the following is a characteristic of all chemical changes?
a)
New material is formed
b)
Light is given off
c)
Different state of matter
59.
Which of the following would not be considered a chemical reaction?
a)
Tearing up a newspaper
b)
Digesting food
c)
Acid rain dissolving rock
60.
Which of the following is an example of a chemical change?
a)
Slicing bread
b)
Burning sugar
c)
Clay molded into a pot
61.
Jeff was trying to determine if his experiment had undergone a physical or chemical change. Which observation could mean that it was NOT a chemical change?
a)
Something burning
b)
Bubbles of a gas forming
c)
Change in color
62.
Which is a physical change?
a)
burning match
b)
vinegar in baking soda
c)
melting butter
d)
cooking an egg
63.
Is making a cake physical or chemical
a)
physical
b)
chemical
c)
ducktile
d)
maluable
100 %
