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Chemistry Test #2 Review (2nd Semester)

Total questions: 271

Worksheet time: 6hrs 33mins

Name
Class
Date
1.
Which is the reactant - and why?
a)
A, as concentration decreases
b)
B, as concentration decreases
c)
A, as concentration increases
d)
B, as concentration increases
2.
At what time the reaction reached equilibrium?
a)
t1
b)
t2
c)
t3
d)
t4
3.
For the reaction...
SO2 + O2  <=>  SO3
If the concentration of SO2 is increased, the equilibrium position of the reaction will shift ___________.
a)
to the left
b)
to the right
c)
to the left and right 
d)
neither left nor right
4.
What is the Kc expression for this reaction?
   2 NO(g)  +  O2(g) ⇌  2 NO2(g)
a)
Kc = [NO2]2 / [NO]2 [O2]
b)
Kc =  [NO]2 [O2] / [NO2]2
c)
Kc = [NO]2 [O2] [NO2]2
d)
Kc = [NO2]2 / [NO]2 +  [O2]
5.
Consider the following reaction:
2SO2(g) + O2(g) <=> 2SO3(g):  ΔΗ = - 197 kJ mol -1
Which of the following will NOT shift the equilibrium position to the right?
a)
Adding more O2
b)
Adding a catalyst
c)
increasing the pressure
d)
Lowering the temperature
6.
Given: 2A(g) <=> 2B(g) + C(g). At a particular temperature, Kc = 16000.
Raising the pressure, by decreasing the volume of the container, will...
a)
cause the value of Kc to increase
b)
cause the value of Kc to decrease
c)
have no effect on the value of Kc as temperature does not change
d)
favour the forward reaction
7.
What are [A] and [B]?
a)
concentration of reactants
b)
concentration of products
c)
energy of reactants
d)
energy of products
8.
The following reaction :    
SO2 (g) +  NO2 (g) <=> SO3 (g) + NO (g)  
had reached a state of equilibrium, was found to contain  
0.40 mol L-1 SO3 , and 0.30 mol L-1 NO,
0.15 mol L-1NO2 , and 0.20 mol L-1 SO2.
Calculate the equilibrium constant  for this reaction. 
a)
4
b)
.42
c)
.25
d)
1
9.
What is the equilibrium expression for:
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =
a)
[Fe]3 [H2O]4  / [Fe3O4] [H2]4
b)
[Fe3O4] [H2]4 /  [Fe]3 [H2O]4
c)
[H2O]4 / [H2]4
d)
[Fe] [H2O] / [Fe3O4] [H2]
10.
If the equilibrium constant is much greater than one (K >> 1) then
a)
Equilibrium is not established.
b)
Equilibrium lies to the right (products are favored)
c)
Equilibrium lies to the left (reactants are favored)
d)
Neither products or reactants are favored.
11.
If the equilibrium constant is much less than one (K << 1) then
a)
Equilibrium is not established.
b)
Equilibrium lies to the right (products are favored)
c)
Equilibrium lies to the left (reactants are favored)
d)
Neither products or reactants are favored.
12.
N2O4(g) ↔ 2 NO2(g)
What is the concentration equilibrium constant expression?
a)
Kc = [NO2]2/[N2O4]
b)
Kc = [N2O4]/[NO2]2
c)
Kc = [N2O4]2/[NO2]
d)
Kc = [NO2]/[N2O4]2
13.
What is the equilibrium-constant expression for 
CO2(g) + H2(g) ↔ CO(g) + H2O(l)
a)
Kc= [CO][H2O] / [CO2][H2]  
b)
Kc= [CO2][H2] / [CO]
c)
Kc= [CO2][H2] / [CO][H2O]
d)
Kc= [CO] / [CO2][H2]  
14.
Consider the following reaction. What would be the equilibrium constant expression?
4Br2(g) + CH4(g) ↔  4HBr(g) + CBr4(g)
a)
[Br2]4  [CH4]/ [HBr]4  [CBr4]
b)
[HBr]4 [CBr4]/ [Br2]4 [CH4]
c)
[HBr ]/ [Br2]4 [CH4]
d)
[HBr]4 [CBr4]/ [Br2]4 [CH]4
15.
Equilibrium is a __________ process
a)
Static
b)
Dynamic
c)
Probabilistic
d)
Fictitious
16.
At equilibrium the concentration of all species in the reaction is _________.
a)
Constant
b)
Increasing
c)
Decreasing
d)
Oscillating
17.
The idea that when a system at equilibrium is stressed, it will react to relieve that stress and return to equilibrium is known as:
a)
Boyle's Law
b)
Le Chatelier's Principle
c)
Charles Law
d)
Denninger's Law
18.
2NH3+22kJ↔N2+3H2
Which direction does the reaction shift if NH3 was added?
a)
Shift right 
b)
Shift left
c)
No shift
d)
Shift both directions
19.
2NH3+22kJ↔N2+3H2
Which direction does the reaction shift if NH3 was removed?
a)
Shift right 
b)
Shift left
c)
No shift
d)
Shift both directions
20.
2NH3+22kJ↔N2+3H2
Which direction does the reaction shift if H2 was removed?
a)
Shift right 
b)
Shift left
c)
No shift
d)
Shift both directions
21.
2NH3+22kJ↔N2+3H2
Which direction does the reaction shift if N2 was removed?
a)
Shift right 
b)
Shift left
c)
No shift
d)
Shift both directions
22.
Increasing the temperature on a ________ reaction will increase the concentration of products.
a)
Endothermic
b)
Exothermic
c)
Isothermic
23.
Decreasing the temperature of an exothermic reaction will shift the reaction to the ________ 
a)
left
b)
right
24.
Adding an inhibitor to a reaction will...
a)
increase the rate of reaction.
b)
decrease the rate of reaction.
c)
increase the equilibrium concentration of products.
d)
increase the equilibrium concentration of reactants.
25.
If K < Q, which part of the reaction will speed up?
a)
forward
b)
reverse
c)
none
26.
2A + 3B  <---->  2AB
The forward reaction forms the substance __________.
a)
A
b)
B
c)
AB
d)
A + B
27.
For the reaction...
SO2 + O2 <−>  SO3
If the equilibrium shifts to the right, the concentration of O2 will ___________.
a)
increase
b)
decrease
c)
remain the same
d)
double
28.
For the reaction...
heat  +  N2  +  O2  <−>  2NO
If  NO is removed  from the system, the concentration of N2 will _______.
a)
increase
b)
decrease
c)
remain the same
d)
double
29.
For the reaction...
H2 (g)  + Cl2 (g) <−>  2HCl (g)  +  heat
If the temperature is cooled, the _________ reaction will be favored.
a)
forward
b)
reverse
c)
forward and reverse
30.
For the reaction...
N2 (g) +  3 H2 (g) <−> 2 NH3 (g)

If the pressure in the system is increased,  which substance will increase in concentration?
a)
N2
b)
H2
c)
N2 and H2
d)
NH3
31.

What is the effect of increasing the pressure on the following equilibrium: 2NO(g) + O2 (g) ⇌2NO2(g)?

a)

The yield of NO2 increases

b)

The yield of NO2 decreases

c)

The reaction is slower

d)

The concentration of O2 increases.

32.
Which of the following is NOT true at equilibrium?
a)
The forward and reverse reactions proceed at the same rate.
b)
The concentrations of reactants and products do not change.
c)
The concentration of the reactants is equal to the concentration of the products.
d)
The forward and reverse reactions continue to occur.
33.
How do catalysts increase the rate of reaction?
a)
The frequency of collisions is the increased
b)
the activation energy is lowered
c)
the energy of collisions is increased
d)
Both the frequency and energy of collisions is increased
34.
2SO2(g)+O2(g)⇌2SO3(g)
Decreasing volume of container will
a)
shift equilibrium right
b)
shift equilibrium left
c)
change K
d)
have no change
35.

For the following reaction: H2(g) + Cl2 (g) ↔ 2HCl(g), calculate the concentration of HCl when Keq= 2.3x10-5, [H2]= 0.0056mol, [Cl2]= 0.0048mol.

a)

6.2 x 10-10 M

b)

2.5 x 10-5 M

c)

1.1 M

d)

1.2 M

36.

PCl3 (g) + Cl2 (g) ↔ PCl5 (g) + energy

Which of the following causes an increase in the moles of PCl5 present at equilibrium shown?

a)

decreasing the volume of the container

b)

raising the temperature

c)

adding a mole of He gas at constant volume

d)

adding a mole of He gas at constant pressure

37.

What kind of equilibrium does the reaction below show?

H2(g) +I2(g) ↔ 2HI(g)

a)

Heterogeneous equilibrium, all the reactants and products are in the same physical state.

b)

Homogeneous equilibrium, all the reactants and products are in the same physical state.

c)

Heterogeneous equilibrium, the reactants and products are present in more than one physical state

d)

Homogeneous equilibrium, the reactants and products are present in more than one physical state

38.
For the reaction...
heat  +  N2  +  O2  <−>  2NO
If the heat is removed from the chemical system, the concentration of N2 will _______.
a)
increase
b)
decrease
c)
remain the same
d)
double
39.
For the reaction...
H2 (g)  + Cl2 (g) <−>  2HCl (g)  +  heat
If the pressure in the system is increased, the equilibrium will _______.
a)
shift left
b)
shift right
c)
not shift
40.

H2(g)+Cl2(g)⇌2HCl(g)

The forward reaction is exothermic. What will happen to the equilibrium if the temperature is increased?

a)

equilibrium shifts right

b)

equilibrium shifts left

c)

You cannot predict the effect

d)

no change

41.
Identify the labels (a) and (b) on the graph.
a)
a is concentration of reactants and b is the concentration of product
b)
a is concentration of product and b is the concentration of reactant
c)
a is the volume of reactants and b is the volume of product
d)
a the mass of reactants and b is the mass of product
42.
Changes in pressure will only affect substances that are in the __________ state.
a)
gaseous
b)
liquid
c)
solid
d)
plasma
43.
What are the two factors to look for when determining if the reaction is at equilibrium?
a)
Forward reaction rate is faster than the reverse and concentrations are equal
b)
Forward and reverse reaction rates are equal and concentration is constant
c)
Forward and revers reaction rates are equal and concentration is equal
d)
Forward reaction rate is faster than the reverse and concentration is equal
44.
This symbol indicates that a reaction is ____________
a)
reversible
b)
irreversible
45.
When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in
a)
Chemical Equilibrium
b)
Chemical Balance
c)
Stoichiometry
d)
Chemical Reaction
46.

Such reactions which continue in both directions are called:

a)

Irreversible reactions

b)

Reversible reactions

c)

Non-reactive reactions

d)

dynamic reactions

47.

A complete reaction is in which:

a)

All the reactants convert into products

b)

All the reactants do not convert into products

c)

Half reactants convert into products

d)

only 10% reactants convert into products

48.

When we investigate the rate of reaction we are looking at the...

a)

amount of product formed

b)

speed of reaction

c)

concentration of reacting particles

d)

combining reactants with products

49.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
50.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Neutralise the reaction
d)
increase collision between the particles thus increasing the rate.
51.
Why does a catalyst increase the rate of reaction?
a)
it produces extra energy for the reactants
b)
it increases the speed of the reactant particles
c)
it increases the frequency of particle collisions
d)
it reduces the activation energy of the reaction 
52.
You add more bodies into a "mosh pit" to hope for more collisions.  You have increased-
a)
temperature
b)
concentration
c)
pressure
d)
catalyst
53.
Which of the following increase the reaction rate?
a)
less surface area
b)
lower temperature
c)
an inhibitor
d)
increased concentration
54.
Why don't all collisions between particles cause a reaction?
a)
the particles also need to collide with a catalyst
b)
not all the particles collide with enough energy
c)
not all the particles collide at a high enough temperature
d)
the particles need to collide with each other twice
55.
Why does a higher temperature increase the rate of a reaction?
a)
it increases both the frequency and energy of particle collisions
b)
it only increases the frequency of particle collisions
c)
it only increases the energy of particle collisions
d)
it reduces the activation energy of the reaction
56.
To slow down a chemical reaction you will do one of the following:
a)
Place the reactants in hot water
b)
Place the products in ice bath
c)
Place the reactants in a ice bath
d)
Keep stirring the reactants with a stirring rod
57.

How could we make this reaction happen more quickly?

a)

Decrease the concentration of the acid

b)

crush the chalk to increase the surface area

c)

Put the test tube in an ice bath

58.

Creating fossils is a very _____ chemical reaction

a)

Fast

b)

Slow

c)

It is not a chemical reaction

59.

What does the M after a concentration value stand for?

a)

meters

b)

music

c)

Molarity

d)

moles

60.

Which is the highest concentration?

a)

10m

b)

2M

c)

25 mmol

d)

0.5M

61.

The major theory of reaction rate is called

a)

Collision theory

b)

Crash theory

c)

Newton's laws

d)

Thermodynamics

62.

When surface area is decreased the rate of reaction...

a)

Decreases, because there are LESS possible sites for correct collisions

b)

Increases, because there are LESS possible sites for correct collisions

c)

Decreases, because there are MORE possible sites for correct collisions

d)

Increases, because there are MORE possible sites for correct collisions

63.

You know that a chemical reaction is occurring here because you see __________________ . (Pick 3)

a)

purple color

b)

smoke

c)

ice formation

d)

fire

e)

a yellow precipitate

64.

In this chemical reaction, what was the first evidence that you saw?

a)

Production of fire

b)

Production of light

c)

Production of purple smoke

d)

Production of white powder

65.

The result of the experiment between Iodine and Aluminum was the production of __________________.

a)

clear liquid.

b)

a white powder.

c)

yellow precipitate.

d)

bubbles.

66.

When zinc reacted with hydrochloric acid, what was the result of this reaction?

a)

a white powder

b)

a blue liquid

c)

a brown precipitate

d)

a gas

67.

We know that there was a chemical reaction occurring when 2 clear liquids were mixed together. That is because we show the production of a _____________.

a)

solid.

b)

precipitate.

c)

gas.

68.

A precipitate is a ___________ that forms when 2 liquids react together.

a)

solid

b)

liquid

c)

gas

d)

plasma

69.

Reactants are the chemicals that are present at the beginning of an experiment. Reactants react together to make the product.

We can know that a chemical reaction is occurring when we see ______.

a)

that the product looks just like the reactants.

b)

nothing new.

c)

that the product looks different from the reactants.

70.

Which of the following is evidence of a chemical reaction?

a)

Tearing paper.

b)

Change in color.

c)

Production of a gas.

d)

Change in temperature.

e)

Production of a precipitate.

71.

List four factors that affects the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

e)

catalysts

72.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

73.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

74.
The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?
a)
Red, because the activation energy is larger
b)
Blue, because the activation energy is lower
c)
both reaction progress at the same rate
75.
What does NOT happen when the temperature is increased?
a)
Particles collide more often
b)
Particles collide with more energy
c)
Particles move faster
d)
More particles collide in the correct orientation
76.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
77.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

78.

Why does a higher temperature increase the rate of a reaction?

a)

it increases both the frequency and energy of particle collisions

b)

it only increases the frequency of particle collisions

c)

it only increases the energy of particle collisions

d)

it reduces the activation energy of the reaction

79.

The ______________is required to break the bonds of the reactants.

a)

Carbonic energy

b)

Activation energy

c)

Plutonic energy

d)

Energi Gaib

80.
What makes an effective collision?
a)
When molecules collide.
b)
When molecules collide with the proper orientation.
c)
When molecules collide with proper orientation and enough kinetic energy.
d)
High Temperature.
81.
Why don't all collisions between particles cause a reaction?
a)
the particles also need to collide with a catalyst
b)
not all the particles collide with enough energy
c)
not all the particles collide at a high enough temperature
d)
the particles need to collide with each other twice
82.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
83.
Located on the left side of the reaction
a)
reactants
b)
products
84.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

85.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
86.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

87.

Adding a catalyst ___________ the activation energy.

a)

Raises

b)

Lowers

c)

Doesn't affect

d)

Inreases

88.

Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?

a)
b)
c)
d)
89.
The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off? 
a)
A
b)
B
c)
C
d)
D
90.
In an experiment, a 2 g lump of zinc and 2 g of powdered zinc are added separately to equal volumes of dilute sulphuric acid. The solid line on the graph shows the volume of gas given off when the 2 g lump is used. Which dotted line is obtained when the zinc is powdered? 
a)
A
b)
B
c)
C
d)
D
91.
A student investigated the rate of reaction of calcium carbonate with dilute hydrochloric acid. Every minute, the student recorded the total volume of carbon dioxide produced, until some time after the reaction was complete.
Which graph shows the correct results? 
a)
A
b)
B
c)
C
d)
D
92.
Order the letters from highest to lowest rate of reaction.
a)
A > B > C > D
b)
A > BC > D (B and C have the same rate)
c)
A > B > CD (C and D have the same rate)
d)
D > C > B > A
93.
Which letter corresponds to the activation energy of the forward reaction?
a)
A
b)
B
c)
C
d)
D
94.

Which factors affect the rate of a reaction?

a)

temperature

b)

concentration

c)

surface area

d)

pressure

e)

catalyst

95.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

96.

The minimum amount of energy needed for colliding particles to react is called the

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

97.

A substance that increases the rate of a reaction without being used up during the reaction is called a

a)

catalyst

b)

product

c)

reactant

d)

solute

98.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
99.
A catalyst increases the efficiency of collisions between reactants.
a)
true
b)
false
100.

What is the name given to a catalyst in the human body?

a)

Biology

b)

Catalyst

c)

Chemical

d)

Enzyme

101.

Which of the reaction pathway shows the catalysed reaction?

a)

1

b)

2

102.

When a catalyst is added to a reaction the rate of reaction,,,

a)

Increases

b)

Decreases

c)

Does not change

103.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by making them more available

c)

by giving them more energy

104.

A catalyst

a)

is used up

b)

is nevr used up

105.

A catalyst be regenerated or used again and again

a)

False

b)

True

106.

A catalyst changes the mechanism of the reaction

a)

True

b)

False

107.

Catalysts may be in the state of ___________.

a)

Solid and liquid only

b)

Liquid and gases only

c)

Solid and gases only

d)

Solid, liquid or gases

108.

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

a)

Red, because the activation energy is larger

b)

Blue, because the activation energy is lower

c)

both reaction progress at the same rate

109.

Enzymes in your body probably work best at which of the following temperatures>

a)

25oC

b)

37oC

c)

98oC

d)

100oC

110.

What is activation energy?

a)

energy to get up in the morning

b)

energy to boil a kettle

c)

minimum energy required for a reaction to occur

d)

maximum energy needed for a reaction to occur

e)

the number of particles in a reaction

111.

What does increasing the temperature do?

a)

breaks the reactants up in to smaller pieces

b)

increase amount of product

c)

increase energy of particles

d)

increase the number of particles

e)

slower the particles down

112.

What does increasing the surface area do?

a)

breaks the reactants up in to smaller pieces

b)

increase amount of product

c)

increase energy of particles

d)

increase the number of particles

e)

slower the particles down

113.

What does increasing the concentration do?

a)

breaks the reactants up in to smaller pieces

b)

increase amount of product

c)

increase energy of particles

d)

increase the number of particles

e)

slower the particles down

114.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
115.
Enzymes are...
a)
nucleic acids
b)
proteins
c)
lipids
d)
carbohydrates
116.
An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 
a)
true
b)
false
117.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
118.

Enzymes are found in

a)

our cells

b)

animals

c)

plants

d)

all of the options are correct

119.

There are many different types of enzymes.

a)

True

b)

False

120.

If the temperature of the environment is not correct the enzyme may not work.

a)

True

b)

False

121.

What will the balanced equation be if you react:

CaCl2 + NaOH

a)

CaCl2 + 2 NaOH --> Ca(OH)2 + 2 NaCl

b)

CaCl2 + 2 NaOH --> CaOH + 2 NaCl

c)

CaCl2 + 2 NaOH --> CaNa2 + 2 ClOH

d)

no reaction

122.

What is the precipitate formed between CaCl2 and NaOH?

a)

CaCl2

b)

NaOH

c)

Ca(OH)2

d)

NaCl

e)

no precipitate is formed

123.

Will the reaction between NaOH and KCl occur?

a)

Yes

b)

No

124.

Mark the indicators of a double displacement reaction.

a)

Water is formed

b)

gas is formed

c)

a precipitate is formed

d)

a phase change occurs

e)

none of these are correct

125.

Will the reaction between Cu(NO3)2 and K2SO4 happen?

a)

yes

b)

no

126.

Which equation is a double displacement reaction?

a)

Cl2 + 2KI --> 2KCl

b)

Fe + O2 --> Fe2O3

c)

CaCO3 --> CO2 + CaO

d)

CaCO3 + 2HCl --> CaCl2 + H2CO3

127.

What are the products for a reaction between KCl and AgNO3

a)

KAg + ClNO3

b)

KCl + AgNO3

c)

KNO3 + AgCl

d)

no reaction occurs

128.

Identify the single replacement reaction

a)

Cl2 + 2KI --> 2 KCl + I2

b)

Fe + O2 --> Fe2O3

c)

CaCO3 --> CaO + CO2

d)

2P + 5O2 --> P2O5

129.

Identify the decomposition reaction

a)

Cl2 + 2KI --> 2 KCl + I2

b)

Fe + O2 --> Fe2O3

c)

CaCO3 --> CaO + CO2

d)

2P + 5O2 --> P2O5

130.

Predict the products:

Mg(NO3)2 + CaCl2 →

a)

Mg(NO3)2 + CaCl2

b)

MgCa + Cl2(NO3)2

c)

Ca(NO3)2 + MgCl2

d)

CaNO3 + MgCl

131.
AB + CD →AD + CB
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
132.
2 AgNO3 + Cu --> Cu(NO3)2 + 2 Ag 
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
133.
A + BC →B + AC
a)
Single Replacement
b)
Decomposition
c)
Double Replacement
d)
Synthesis
134.

Based on the activity series, will this reaction occur?

Au (s) + HCl (aq) →

a)

Yes

b)

No

135.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

136.
A displacement (single replacement) reaction will occur when...
a)
a more reactive metal displaces a less reactive metal from its compound.
b)
A less reactive metal displaces a more reactive metal from its compound
c)
Displacement only occurs when two of the same metals are reacted 
d)
Displacement reactions will only occur in metals above iron in the reactivity series
137.

Which among the following is(are) double displacement

reaction(s)?

(i) Pb + CuCl2 --> PbCl2 + Cu

(ii) Na2SO4 + BaCl2 --> BaSO4 + 2NaCl

(iii) C + O2 --> CO2

(iv) CH4 + 2O2 --> CO2 + 2H2O

a)

(a) (i) and (iv)

b)

(b) (ii) only

c)

(c) (i) and (ii)

d)

(d) (iii) and (iv)

138.

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved?

(i) Displacement reaction

(ii) Precipitation reaction

(iii) Combination reaction

(iv) Double displacement reaction

a)

(a) (i) only

b)

(b) (ii) only

c)

(c) (iv) only

d)

(d) (ii) and (iv)

139.

Determine the two products when Na3PO4 reacts with SnO2.

a)

NaO and SnPO4

b)

Na2O and Sn(PO4)2

c)

Na2O and Sn3PO4

d)

Na2O and Sn3(PO4)4

140.

Determine the products when FeCO3 and AgOH mix.

a)

Fe(OH)3 and Ag2CO3

b)

Fe(OH)2 and Ag2CO3

c)

Fe(OH)2 and AgCO3

d)

Fe(OH)3 and AgCO3

141.

When ammonium dichromate reacts with zinc nitride, what are the products?

a)

zinc nitrate and ammonium chromate

b)

zinc dichromate and ammonium nitrate

c)

zinc chromate and ammonium nitride

d)

zinc dichromate and ammonium nitride

142.

___ Na2CO3 + ___ Ag3P → ___ Na3P + ___ Ag2CO3

a)

3, 2, 1, 3

b)

2, 2, 2, 3

c)

3, 2, 2, 3,

d)

3, 2, 3, 2

143.

Pick the products when KMnO4 reacts with Al2S3 mix.

a)

K2S

b)

AlMnO4

c)

Al(MnO4)3

d)

KS2

144.

Predict the products when sodium chlorate reacts with barium hydroxide.

a)

NaOH and BaClO3

b)

NaOH and Ba(ClO4)2

c)

Na2OH and Ba(ClO3)2

d)

NaOH and Ba(ClO3)2

145.

____ Cu(OH)2 + ____ (NH4)3P → ____ Cu3P2 + ____ NH4OH

a)

1, 1, 1, 3

b)

3, 1, 1, 3

c)

3, 2, 1, 6

d)

3, 1, 1, 6

146.

____ PbS2 + ____ K3PO4 →____ Pb3(PO4)4 + ____ K2S

a)

3, 2, 1, 3

b)

3, 4, 1, 6

c)

3, 4, 1, 2

d)

3, 2, 1, 2

147.

____ (NH4)2SO4 + ____ AgNO3 → ____ NH4NO3 + ____ Ag2SO4

a)

1, 2, 2, 1

b)

1, 1, 1, 1

c)

1, 1, 2, 1

d)

2, 2, 2, 1

148.

Which products result from nickel II chromate reacting with potassium sulfate?

a)

NiSO4

b)

K2Cr2O7

c)

Ni2SO4

d)

K2CrO4

149.

Predict the products:

NaOH + Fe(NO3)3 →

a)

NaFe + OH(NO3)3

b)

Na(NO3)2 + Fe(OH)3

c)

NaOH + Fe(NO3)3

d)

NaNO3 + Fe(OH)3

150.

Predict the products:

KOH + H3PO4 →

a)

K3PO4 + HOH

b)

KH3 + OHPO4

c)

KOH + H3PO4

d)

KPO4 + H3OH

151.

Predict the products:

Mg(NO3)2 + CaCl2 →

a)

Mg(NO3)2 + CaCl2

b)

MgCa + Cl2(NO3)2

c)

Ca(NO3)2 + MgCl2

d)

CaNO3 + MgCl

152.

Predict the products

Ba(NO3)2 + K2CO3 →

a)

BaNO3 + KCO3

b)

CO3NO3 + KBa

c)

BaCO3 + K2NO3

d)

BaCO3 + KNO3

153.

____ Pb(NO3)2 + ____ Ca3P2 → ____ Pb3P2 + ____ Ca(NO3)2

a)

1, 1, 1, 1

b)

3, 3, 1, 3

c)

3, 1, 1, 3

d)

3, 1, 1, 1

154.

What are the correct products when fluorine gas mixes with ammonium chloride?

a)

F2 + NH4Cl

b)

Cl2 + NH4F2

c)

Cl + NH4F

d)

Cl2 + NH4F

155.

Balance: ____ Al + ____ ZnCO3 → ____ Zn + ____ Al2(CO3)3

a)

1, 1, 2, 2

b)

2, 3, 3, 1

c)

2, 1, 1, 1

d)

2, 3, 1, 1

156.

What are the products when copper II chloride reacts with magnesium metal?

a)

Cu + MgCl2

b)

Cu2 + MgCl2

c)

Cu + MgBr2

d)

Cu + MgCl

157.

Balance: ____ Al2(SO4)3 + ____ Sn → ____ Al + ____ Sn(SO4)2

a)

1, 1, 1, 1

b)

1, 3, 2, 1

c)

2, 3, 4, 3

d)

2, 2, 2, 3

158.

Fe + Ag2CrO4 react. What are the products?

a)

Ag + Fe2CrO4

b)

Ag + Fe(CrO4)3

c)

Ag + FeCrO4

d)

Ag + Fe3CrO4

159.
4Si + S8 --> 2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
160.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
161.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
162.
2Pb(NO3)2 --> 2PbO + 4NO2 + O2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
163.
3Mg + N2 --> Mg3N2
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
164.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
165.
P4 + 3O2 --> 2P2O3
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Combustion
166.
Fe + H2SO4 --> Fe2(SO4)3 + H2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
167.
Which reaction type is the following: C5H10O4 + O2 --> CO2 + H2O
a)
Decomposition
b)
Single Replacement
c)
Combustion
d)
Double Replacement
168.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
169.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
170.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
171.
Balance this equation:
 __Li + __Cl2 -> __LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li +  Cl2 -> 2LiCl
172.
C4H12 + O2 --> CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
173.
H2SO4 + Fe -->H2 + FeSO4
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
174.
PbCl2 + AgNO3 ---> Pb(NO3)2 + AgCl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
175.
NH3 + HCl ---> NH4Cl 
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
176.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
177.
Which chemical reaction takes place when 2 substances react to form a single product?
a)
Decomposition
b)
Double Replacement
c)
Single Replacement
d)
Synthesis
178.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
179.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
180.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
181.
an atom or molecule which has gained or lost one or more of its valence electrons
a)
Covalent Bond
b)
Chemical Formula
c)
Ion
d)
Compound
182.
a substance formed when two or more elements are chemically bonded together
a)
Element Soup
b)
Pure Element
c)
Ion
d)
Compound
183.
tells us the number of atoms of each element in a compound
a)
Coeffecient
b)
Exponent
c)
Chemical Formula
d)
Calculator
184.
both elements in a compound share a certain number of electrons
a)
Share Electrons
b)
Transfer Electrons
185.
one element loses an electron to another
a)
Share Electrons
b)
Transfer Electrons
186.
the symbolic representation of a chemical reaction
a)
Long Hand
b)
Short Hand
c)
Electron Configuration
d)
Chemical Equation
187.
type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
188.
type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
189.
type of reaction in which two or more elements combine to form a more complex compound
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
190.
type of reaction in which a compound is broken down into its simple elements
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
191.

indicates substance is a liquid

a)

g

b)

cr

c)

aq

d)

l

192.
An ending substance that is made during a chemical reaction is called
a)
Reactant
b)
Product
c)
Atom
d)
Molecule
193.
The starting substances of a chemical reaction is called
a)
products
b)
substances
c)
reactants
194.
What are Chemical Reactions?
a)
It's when you mix substances.
b)
a process in which atoms rearrange to form new substances
c)
When something bubbles.
d)
letter and numbers showing the types and number of atoms
195.
Describes the number of atoms in a compound of each element. 
a)
coefficient 
b)
superscript 
c)
subscript 
d)
SI unit 
196.
Is Fe for iron an element or a compound?
a)
compound
b)
element
197.
Which are the products in the reaction shown?
a)
Al2O3
b)
Al
c)
O2
198.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
199.
In the following equation, what are the products?
HCl + Zn → H2 + ZnCl2
a)
HCl + Zn
b)
H2 + ZnCl2
c)
Zn → H2
d)
the stuff on the outside
200.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
201.
The symbol for a substance dissolved in water is
a)
(s)
b)
(l)
c)
(g)
d)
(aq)
202.
What is the arrow in a chemical equation...
H2 + O --> H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
203.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
204.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
a)
Reactants
b)
Products
c)
Atoms
d)
Catalysts
205.
When a chemical reaction happens
a)
bonds must be broken and reformed
b)
chemicals don't collide
c)
atoms keep their arrangements
d)
chemicals keep their same properties
206.
A _________ describes a chemical reaction
a)
chemical equation
b)
chemical symbol
c)
chemical formula
d)
product
207.
What is a chemical reaction?
a)
produces or yields
b)
an attraction between atoms
c)
a process in which one or more substances rearrange to form a new one
d)
state that the identity stays the same before and after 
208.
A chemical equation is a description of a reaction using symbols
a)
TRUE
b)
FALSE
209.
Atoms separate, rearrange, and new bonds form in a chemical reaction
a)
FALSE
b)
TRUE
210.
The arrow in a chemical equation separates two or more reactants 
a)
FALSE
b)
TRUE
211.

Without balancing the final equation, predict the products for the synthesis reaction:  Li + Cl2 →Li\ +\ Cl_2\ \rightarrow  ?

a)

LiCl2LiCl_2  

b)

LiClLiCl_{ }  

c)

Li2Cl2Li_2Cl_2  

d)

Li2ClLi_2Cl_{ }  

212.

Without balancing the final equation, predict the products for the synthesis reaction: Mg + Br2 →Mg\ +\ Br_2\ \rightarrow ?

a)

MgBrMgBr  

b)

MgBr2MgBr_2  

c)

Mg2BrMg_2Br  

d)

Mg2Br2Mg_2Br_2  

213.

Without balancing the final equation, predict the products for Al + Cl2 → ?Al\ +\ Cl_{2\ }\rightarrow\ ?  

a)

Al3ClAl_3Cl  

b)

AlClAlCl  

c)

AlCl3AlCl_3  

d)

Al3Cl2Al_3Cl_2  

214.

Without balancing the final equation, predict the products for the synthesis reaction: Li + P4 → ?Li\ +\ P_4\ \rightarrow\ ?  

a)

Li3PLi_3P  

b)

LiP3LiP_3  

c)

LiP4LiP_4  

d)

LiPLiP  

215.

Without balancing the final equation, predict the products for the synthesis reaction: Al + S8 → ?Al\ +\ S_8\ \rightarrow\ ?  

a)

AlS8AlS_8  

b)

Al3S2Al_3S_2  

c)

Al3S8Al_3S_8  

d)

Al2S3Al_2S_3  

216.

What is the final balanced equation for: Ca + F2 → ?Ca\ +\ F_2\ \rightarrow\ ?  

a)

Ca + F2 → CaF2Ca\ +\ F_2\ \rightarrow\ CaF_2  

b)

Ca + F2 → 2CaFCa\ +\ F_2\ \rightarrow\ 2CaF_{ }  

c)

2Ca + F2 → 2CaF22Ca\ +\ F_2\ \rightarrow\ 2CaF_2  

d)

2Ca + F2 → Ca2F22Ca_{ }\ +\ F_2\ \rightarrow\ Ca_2F_2  

217.

What is the final balanced equation for: Li + P4 → ?Li\ +\ P_4\ \rightarrow\ ?  

a)

Li + P4 → LiP4Li\ +\ P_4\ \rightarrow\ LiP_4  

b)

4 Li + 3 P4 → 4 LiP34\ Li\ +\ 3\ P_4\ \rightarrow\ 4\ LiP_3  

c)

4 Li + P4 → 4 LiP4\ Li\ +\ P_4\ \rightarrow\ 4\ LiP_{ }  

d)

12 Li + P4 → 4 Li3P12\ Li\ +\ P_4\ \rightarrow\ 4\ Li_3P  

218.

What is the final balanced equation for: Na + Br2 → ?Na\ +\ Br_2\ \rightarrow\ ?  

a)

Na + Br2 → NaBr2Na\ +\ Br_2\ \rightarrow\ NaBr_2  

b)

2 Na + Br2 → 2 NaBr2\ Na\ +\ Br_2\ \rightarrow\ 2\ NaBr  

c)

Na + Br2 → 2 NaBrNa\ +\ Br_2\ \rightarrow\ 2\ NaBr  

d)

4 Na + Br2 → 2 Na2Br4\ Na\ +\ Br_2\ \rightarrow\ 2\ Na_2Br  

219.

Write the overall balanced chemical equation for the synthesis reaction: Sr + N2 → ?Sr\ +\ N_2\ \rightarrow\ ?  

a)

Sr + N2 → SrN2Sr\ +\ N_2\ \rightarrow\ SrN_2  

b)

Sr + N2 → Sr3N2Sr\ +\ N_2\ \rightarrow\ Sr_3N_2  

c)

3 Sr + N2 → Sr3N23\ Sr\ +\ N_2\ \rightarrow\ Sr_3N_2  

d)

2 Sr + N2 → 2 SrN2\ Sr\ +\ N_2\ \rightarrow\ 2\ SrN  

220.

Write the overall balanced equation for the synthesis reaction: Li + S8 → ?Li\ +\ S_8\ \rightarrow\ ?  

a)

16 Li + S8 → 8 Li2S16\ Li\ +\ S_8\ \rightarrow\ 8\ Li_2S  

b)

Li + S8 → LiS8Li\ +\ S_8\ \rightarrow\ LiS_8  

c)

2 Li + S8 → Li2S82\ Li\ +\ S_8\ \rightarrow\ Li_2S_8  

d)

8 Li + S8 → 8 LiS8\ Li\ +\ S_8\ \rightarrow\ 8\ LiS  

221.
A decomposition reaction can be represented as _____________________.
a)
AB  → A + B
b)
A + B → AB
c)
AB + CD → AC + BD
d)
A + BC → B + AC
222.
A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.
a)
single-replacement reaction
b)
synthesis reaction
c)
double-replacement reaction
d)
decomposition reaction
223.
This chemical equation for mercury oxide is an example of what type of reaction?
2HgO  → 2Hg + O2
a)
decomposition reaction
b)
synthesis reaction
c)
combustion reaction
d)
Marvin the Martian reaction
224.
Choose the balanced chemical equation for the formation of iron oxide.
a)
2Fe + O2 → 2FeO2
b)
Fe + O2 → FeO2
c)
4Fe + 3O2 → 2Fe2O3
d)
4Fe + O2 → 2FeO2
225.
A chemical change in which two or more substances react to form a new substance is a ____________________________.
a)
decomposition reaction
b)
synthesis reaction
c)
double displacement reaction
d)
combustion reaction
226.
A synthesis reaction can be represented as ________________________.
a)
AB + CD → AC + BD
b)
AB → A + B
c)
A + B → AB
d)
A + BC → B + AC
227.
This chemical equation for magnesium oxide is an example of what type of reaction?
2Mg + O2  → 2MgO
a)
decomposition reaction
b)
synthesis reaction
c)
single displacement reaction
d)
combustion reaction
228.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
229.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
230.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
231.
Which coefficients are required to correctly balance the equation: 
C2S2 + O2 → CO2 + S2O
a)
1, 2, 3, 2
b)
2, 5, 4, 2 
c)
2, 4, 5, 2
d)
2, 3, 5, 2 
232.

Balancing the following:

____ Al + ____ HCl → ____ AlCl3 + ____ H2

a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
233.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of  atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
234.

Balance the following:

____ H2SO4 + ____ NaNO2 → ____ HNO2 + ____ Na2SO4

a)
1,1,2,1
b)
1,2,2,1
c)
2,3,3,2
d)
4,3,2,1
235.
Balance the following: Fluorine and Aluminum oxide react to produce Aluminum fluoride and Oxygen
a)
6,2,4,3
b)
3,4,2,6
c)
5,1,3,2
d)
3,2,4,3
236.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
237.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
238.

Balance this reaction:

____ Na3PO4 + ____ KOH ---> ____ NaOH + ____ K3PO4

a)

1,3,3,1

b)

1,3,2,1

c)

2,3,3,1

d)

1,1,3,1

239.

Balancing this reaction:

____ CH4 + ____ O2 ---> ___ CO2 + ____ H2O

a)

2,1,3,1

b)

1,2,1,2

c)

1,2,2,1

d)

2,1,1,2

240.

Balance this reaction:

____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF

a)

1,1,1,1

b)

1,2,1,1

c)

2,1,1,2

d)

2,1,2,1

241.
When balancing equations, the rule is that you can only add, change, and remove
a)
Coefficients
b)
Mass
c)
Subscripts
d)
Elements 
242.

Balance the following:

Aluminum nitrate and Carbonic acid react to form

Aluminum carbonate and Nitric acid

a)
4,1,2,5
b)
1,3,6,2
c)
2,1,3,6
d)
2,3,1,6
243.
The following reaction is an example of what reaction type? 
CoCO3 → CoO + CO2
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
244.

What type of reaction involves one element replacing another element in a compound?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

245.

What type of reaction involves ions from 2 compounds exchanging places to form 2 completely new compounds?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

246.

What are the reactants in the chemical equation pictured?

a)

CH4 and CO2

b)

CH4 and O2

c)

CO2 and H2O

d)

O2 and H2O

247.

What are the products of the chemical reaction pictured?

a)

CH4 and CO2

b)

CH4 and O2

c)

CO2 and H2O

d)

O2 and H2O

248.

What type of chemical reaction is this one?

Al(OH)3 --> Al2O3 + H2O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

249.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

250.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

251.

3KOH + H3PO4 --> K3PO4 + 3H2O

a)

Combination

b)

Decomposition

c)

Single replacement

d)

Double replacement

252.
CxHy +O2 --> H2O + CO2
a)
Decomposition
b)
Double replacement
c)
Combustion
d)
Single Replacement
253.
Pb(NO3)2 --> PbO + NO2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
254.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H2O

255.

Balancing this reaction:

____ CH4 + ____ O2 ---> ___ CO2 + ____ H2O

a)

2,1,3,1

b)

1,2,1,2

c)

1,2,2,1

d)

2,1,1,2

256.

Balance this reaction:

____ Na3PO4 + ____ KOH ---> ____ NaOH + ____ K3PO4

a)

1,3,3,1

b)

1,3,2,1

c)

2,3,3,1

d)

1,1,3,1

257.

Balance this reaction:

____ NaF + ____ Br2 ---> ___ NaBr + ____ F2

a)

3,1,2,1

b)

1,2,3,4

c)

2,1,2,1

d)

1,2,1,2

258.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
259.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
260.

Predict the products for this substance: Al2O3 → ? + ?

a)

Al + O2

b)

O2 + Al3

c)

Al2 + O3

d)

Al + O

e)

Al3 + O

261.
What are the products of this reaction?
Cu+ AgNO3--> 
a)
Cu(NO3)2+Ag
b)
CuNO3 + Ag
c)
CuAg+NO3
d)
Cu+ AgNO3
262.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
263.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
264.
What kind of reaction is this:
4Fe  +  3O2 →   2Fe2O3 
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Double Replacement
265.
What kind of reaction is this:
2H2O2 →2 H2O + O2
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Combustion
266.
What kind of reaction is this:
Fe + CuSO4 -> Cu + FeSO4
a)
Double Replacement
b)
Decompostion
c)
Single Replacement
d)
Combustion
267.

What are the products of this reaction?

Cu2+ + AgNO3 →

a)

Cu(NO3)2 + Ag

b)

CuNO3 + Ag

c)

CuAg + NO3

d)

Cu + AgNO3

268.

Write a balanced reaction for this reaction [Zn has a charge of 2+]

Zn(s) + H2S(aq) →

a)

ZnS + H

b)

ZnS + H2

c)

ZnS2 + H

d)

Zn2S + H2

269.
Predict the products for the this reaction:
K + HCl --> 
a)
KCl + H2
b)
KHCl 
c)
KH + Cl2
d)
KCl + H
270.

Predict the products for the this reaction:

Mg + CuCl2 →

a)

MgCl2 + Cu

b)

MgCl + Cu

c)

MgCu + Cl2

d)

CuMg + Cl2

271.

Predict the products for the this reaction: [Ag has a charge of 1+]

Ag3N + KCl →

a)

AgCl + K3N

b)

AgK + ClN3

c)

AgN3 + KCl

d)

KAg + N3Cl

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