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Worksheets

FINAL Review 2025

Total questions: 75

Worksheet time: 2hrs 15mins

Name
Class
Date
1.
For an exothermic reaction, the heat is on the ____ side
a)
reactant
b)
product
c)
either side
2.
For an endothermic reaction, the heat is on the ____ side.
a)
reactant
b)
product
c)
either side
3.
Exothermic reaction:
a)
delta H is positive
b)
delta H is negative
c)
delta H is zero
4.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

5.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

6.
State whether the following compound is soluble or insoluble.  calcium carbonate CaCO3 
a)
soluble
b)
insoluble
7.
State whether the following compound is soluble or insoluble. potassiun bromide KBr
a)
Soluble
b)
Insoluble
8.

What is the precipitate of this reaction?

*must be an insoluble product


MgCl2 + 2 NaOH --> Mg(OH)2 + 2 NaCl

a)

MgCl2

b)

NaOH

c)

Mg(OH)2

d)

NaCl

9.

Identify the precipitate in the reaction:

*must be an insoluble product

CdSO4 + K2S → CdS + K2SO4

a)

CdSO4

b)

K2S

c)

CdS

d)

K2SO4

10.

If pressure goes down in a container, what happens to volume when the temperature is held constant.

a)

Increase

b)

Decrease

11.

If temperature goes down in a container, what happens to volume when the pressure is held constant.

a)

Increase

b)

Decrease

12.

How would you convert 34oC to Kelvin?

a)

K = oC + 273

b)

oC = K + 273

c)

K = oC - 273

d)

oC = K + 273

13.
What is 50 C in Kelvin?
a)
223
b)
323
c)
100
d)
50
14.
What will happen to the volume of a gas if the pressure increases, with constant temperature ?
a)
Increase
b)
Decrease
c)
Nothing
d)
Explosion!
15.
In order to solve gas law calculations, temperature must be measured in:
a)
Fahrenheit
b)
Celsius
c)
Kelvin
d)
It doesn't matter 
16.
True or False: Gases can be compressed. 
a)
True
b)
False
17.
Gas molecules can easily be compressed  because ___________. 
a)
gas molecules are soft
b)
gas molecules are far apart
c)
gas molecules follow the shape of the container
18.

Which reaction releases more energy?

a)

Fission

b)

chain reaction

c)

Fusion

d)

Photosynthesis

19.

_____is the joining of atomic nuclei

a)

Fusion

b)

chain reaction

c)

Photosynthesis

d)

Fission

20.

_______is the splitting of atomic nuclei

a)

Fission

b)

nuclear reaction

c)

Fusion

d)

bayler reaction

21.
What is the molarity of 1 mole of Ba+ in 2 L of water
a)
1 M
b)
2 M
c)
.5 M
d)
.25 M
22.
Acids are what range on the pH scale?
a)
0-14
b)
0-6.99
c)
7
d)
7.1-14
23.
7 on the pH scale means that it is...
a)
Acidic
b)
Basic
c)
Neutral
24.
What color does acid turn litmus paper?
a)
It turns litmus paper purple.
b)
It turns red litmus paper blue.
c)
It turns blue litmus paper blue.
d)
It turns blue litmus paper red.
25.
What color does bases turn litmus paper?
a)
It turns litmus paper purple.
b)
It turns blue litmus paper red.
c)
It turns red litmus paper blue.
d)

It turns red litmus paper red

26.
Drain cleaner has a pH of 13. What is drain cleaner?
a)
An acid.
b)
A strong base.
c)
Neutral.
d)
A weak base.
27.

If a solution is basic which ion will be more present?

a)

H+

b)

K+

c)

OH-

d)

H-

28.

Do acids and bases conduct electricity?

a)

Only acids conduct electricity

b)

Only bases conduct electricity

c)

Bases and acids conduct electricity

d)

Neither conduct electricity

29.

According to Bronsted-Lowry, which of the following will "donate" an H+ ion?

a)

Acid

b)

Base

c)

Solution

d)

Water

30.

CF₄ + Br₂ → CBr₄ + F₂

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

31.

N₂ + H₂ → NH₃

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

32.

P₄ + O₃ → P₃O₃

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

33.

HCN + CuSO₄ → H₂SO₄ + Cu(CN)₂

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

34.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
35.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
36.
__Na + __Cl2 --> __NaCl
a)
1,1,2
b)
2,1,2
c)
2,1,1
d)
already balanced
37.
__H2O2 --> __H2O + __O2
a)
already balanced
b)
2,1,1
c)
2,2,1
d)
2,1,2
38.
Which energy conversion is taking place when you put gasoline in a car?
a)
thermal -> electrical
b)
mechanical -> electrical
c)
chemical -> mechanical
d)
mechanical -> electromagnetic
39.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
40.
Electrical -> Mechanical -> Sound 
a)
A triple beam balance measuring an object’s mass
b)
A pencil sharpener plugged into a wall outlet
c)
A projector displaying a diagram on the screen
d)
A working flashlight used to light up a dark corner
41.
Energy you get from eating an apple
a)
nuclear energy
b)
electromagnetic energy
c)
sound energy
d)
chemical energy
42.
Which energy transformation occurs in a toaster?
a)
chemical to electric
b)
electric to thermal
c)
kinetic to chemical
d)
thermal to potential
43.

Which type of radiation can only be stopped by concrete or lead?

a)

alpha particles

b)

beta particles

c)

gamma rays

44.
Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.
a)
Alpha
b)
Beta
c)
Gamma
45.
Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.
a)
Alpha
b)
Beta
c)
Gamma
46.

What type of elements are needed to form an ionic compound?

a)

two metals

b)

metal & non metal

c)

two non metals

d)

two isotopes

47.

The SI unit of heat and energy is the __________.

a)

Celcius

b)

Kelvin

c)

joule

d)

watt

48.

How much heat does an aluminum block absorb if 10.00 grams are heated from 25.0oC to 50.0oC? the specific heat of aluminum is 0.9025 J/goC

a)

450

b)

-450

c)

225

d)

-225

49.

If 200 grams of water is to be heated from 24.0° C to 100.0° C to make a cup of tea, what is the mass and what is the change in temperature?

a)

m=200g

∆t= -76

b)

m=200g

∆t=124

c)

m=200

∆t=100

d)

m=200g

∆t=76

50.

The unit for temperature is

a)

°C\degree C

b)

J

c)

J/gC

d)

g

51.

What is underlined in the chemical equation below?

Na + Cl ---> NaCl

a)

Products

b)

Reactants

52.

Select all the Reactants

a)

b)

c)

53.

In the chemical equation below, the product is....

Na + Cl ---> NaCl

a)

Na

b)

NaCL

c)

Cl

d)

NaCl

54.

Select all the Products

a)

b)

c)

55.
Substances that form as the result of a chemical reaction
a)
products
b)
reactants
c)
coefficients
d)
subscripts
56.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
57.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
58.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

59.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number in front of a chemical formula.
c)
The number in between the chemical symbols.
d)
The number behind a chemical formula.
60.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
61.

What defines an isotope of an element?

a)

Atoms with the same number of protons but different numbers of electrons

b)

Atoms with the same number of neutrons but different numbers of protons

c)

Atoms with the same number of protons but different numbers of neutrons

d)

Atoms with the same number of electrons but different numbers of protons

62.
In a gas to liquid mixture, an increase in temperature means...
a)
increase in solubility
b)
decrease in solubility
63.
What is a precipitate?
a)
an insoluble reactant formed during a chemical reaction
b)
an insoluble product formed during a chemical reaction
c)
a soluble solvent in a saturated solution
d)
a soluble solute in a saturated solution
64.

Choose the correct set of variables to solve the following problem: What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20⁰C and 1.2 atm?

a)

P = x (unknown), V = 3.2 mol, n = 1.2 atm, T = 20⁰C K

b)

P = 1.2 atm, V = 3.2 mol, n = 20⁰C, T = x (unknown)

c)

P = 293 K, V = 3.2 mol, n = x (unknown), T = 1.2 atm

d)

P = 1.2 atm, V = x (unknown), n = 3.2 mol, T = 293 K

65.

What does the variable "n" represent in the ideal gas law?

a)

pressure

b)

volume

c)

moles

d)

the gas constant

e)

temperature

66.

What does the variable "R" represent in the ideal gas law?

a)

pressure

b)

volume

c)

moles

d)

the gas constant

e)

temperature

67.
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?
a)
82%
b)
0.82%
c)
10.1 %
d)
100%
68.

What part of a balanced chemical equation gives information about the number of moles?

a)

the subscripts

b)

the chemical symbol

c)

the mass

d)

the coefficients

69.

What is the mole ratio of oxygen to iron(III) oxide?

a)
b)
c)
d)
70.

What is the mole ratio of phosphorus to hydrogen?

a)
b)
c)
d)
71.
The limiting reactant
a)
slows the reaction down
b)
is used up first
c)
is the reactant that is left over
d)
controls the speed of the reaction
72.

The amount of energy required to raise the temperature 1ºC for every gram is called____?

a)

Thermal Energy

b)

Specific Heat

c)

Temperature

d)

Kinetic Energy

73.
Where does fusion occur naturally?
a)
Underwater
b)
All around us
c)
In the radioactive waste
d)
On the sun
74.

What is the molar mass of water ( H2OH_2O )?

a)

16 g/mol

b)

18 g/mol

c)

20 g/mol

d)

22 g/mol

75.

Water is often called the "universal solvent" because many substances can be dissolved in water. What property of water allows it to be such a versatile solvent? 

a)

Polarity

b)

its abundance on Earth’s surface

c)

high heat capacity

d)

Expansion upon freezing

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