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Unit 2 Review

Total questions: 67

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

What is the heat of this reaction (ΔH)?

a)

103 kJ

b)

- 35 kJ

c)

-93 kJ

d)

-58 kJ

2.

What color would a strong acid be if bromphenol blue was added to it?

a)

blue

b)

pink

c)

yellow

d)

green

3.

What type of reaction is this a graph of?

a)

Endothermic

b)

Exothermic

4.

The law of conservation of energy says that

a)

energy is never changed in any way

b)

energy can be gained, but not lost

c)

energy is neither gained nor lost, just transformed from one type to another

d)

reactions are always exothermic

5.
Name Fe(NO3)3
a)
Iron (III) Nitrate
b)
Iron (III) Nitride
c)
Iron (II) Nitrate
d)
Iron Nitrate
6.

True or False: All chemical reactions have a change in energy

a)

True

b)

False

7.

Identify the type of chemical reaction pictured above

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

8.

A __ is a substance that helps the reaction go faster, but it not changed or produced during the reaction

a)

catalyst

b)

intermediate

c)

reactant

d)

product

9.

The stored chemical energy in the reactants is a type of ___ energy.

a)

potential

b)

kinetic

c)

kinesthetic

10.

What turns blue litmus paper red?

a)

Acids

b)

Bases

c)

Neutrals

11.

Ice melting is an example of a(n) _____ process

a)

endothermic

b)

exothermic

12.

Which of the following human activities contributes the most to acid rain production?

a)

Burning fossil fuels

b)

Disposing of plastics into landfills

c)

Using nuclear power

d)

emitting carbon dioxide into the air

13.

A burning bunsen burner is an example of an __ reaction.

a)

endothermic

b)

exothermic

14.
In the compound    Iron(III) oxide,    the "III" indicates the 
a)
charge of the iron
b)
number of iron atoms
c)
number of oxygen atoms
d)
total number of ions in the formula
15.

What is true about the energy of a bicycle rider as she goes faster and faster as she goes down a hill?

a)

Kinetic Energy increases, but Potential Energy decreases

b)

Kinetic Energy decreases, but Potential Energy increases

c)

Both Kinetic and Potential Energy Increase

d)

Kinetic Energy increases, but Potential Energy stays the same

16.

If I add more water to this setup, what will happen to the pH?

a)

It will increase slightly and get closer to 7

b)

It will decrease slightly and get closert to 0

c)

It will stay the same and not change at all

17.

Milk is a very weak acid. What might its pH value be?

a)

6.2

b)

7.8

c)

1.5

d)

12.2

18.

A reaction that releases energy during the reaction is said to be

a)

endothermic

b)

exothermic

c)

intermediate

19.

What is the activation energy of this reaction?

a)

58 kJ

b)

35 kJ

c)

45 kJ

d)

103 kJ

e)

10 kJ

20.
Which of the following is NOT a polyatomic ion?
a)
NH4+
b)
HCO3-
c)
Ca2+
d)
SO42-
21.

Identify the type of reaction...

C + O2 −> CO2C\ +\ O_2\ ->\ CO_2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

22.

In a neutralization reaction, an acid and a base react to produce...

a)

Water and a Salt (Ionic Compound)

b)

Water and Carbon Dioxide

c)

Water and Hydrogen gas

23.

What turns red litmus paper blue?

a)

Acids

b)

Bases

c)

Neutrals

24.

Which of the following is an acid?

a)

vinegar

b)

ammonia

c)

window cleaner

d)

sugar water

25.

Which of the following is an acid?

a)

HClO4

b)

CO2

c)

Mg(OH)2

d)

C2H6

26.

Which of the following is a property of a base?

a)

turn phenolpthalein pink

b)

reacts with metals

c)

contain H+ ions

d)

sour taste

27.

What color does universal indicator turn when added to an acid?

a)

Green

b)

Yellow/Orange/Red

c)

Blue/Purple/Dark Green

28.

The strongest bases have pH values close to

a)

0

b)

14

c)

7

d)

5

29.

Which of the following is a base?

a)

baking soda

b)

lemon juice

c)

vinegar

d)

salt water

30.

Ocean water is only slightly basic. What might its pH value be?

a)

5

b)

8

c)

13

d)

2

31.

What color does universal indicator turn when added to a base?

a)

Green

b)

Yellow/Orange/Red

c)

Blue/Purple/Dark Green

32.

What color would water (pH=7) turn if the indicator Congo Red was added to it?

a)

purple

b)

red

c)

blue

d)

yellow

33.

What type of chemical reaction is responsible for producing the dangerous gases that can create acid rain?

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

34.

An airplane gaining altitude as it is flying is increasing in ___ energy.

a)

potential

b)

kinetic

c)

potential and kinetic

35.

Which gases are the most significant pollutants that lead to the production of acid rain?

a)

NO2 and SO2

b)

H2O and CO2

c)

CH4 and CO2

d)

Mercury vapor and arsenic

36.

A mystery substance is found in a beaker. It looks like water, but turned pink when phenolphthalein was added. The substance must be a ...

a)

base

b)

acid

c)

neutral

d)

acid or neutral

37.

When neutralizing an acid with a base, the products are always

a)

Water and a Salt (Ionic Compound)

b)

NOx and SOX

c)

CO2 and H2O

d)

KOH and HCl

38.

A person climbing up a ladder is ___ potential energy.

a)

increasing

b)

decreasing

c)

not changing in

39.

What is the activation energy?

a)

The energy of the products

b)

The energy of the reactants

c)

The amount of energy that must be added to the reactants to get them to react.

d)

The energy lost in the reaction

40.

Acid rain can be damaging to many materials including marble, limestone, and concrete. That is because all of these materials are mainly made out of ________, which reacts with acids.

a)

Calcium carbonate, CaCO3

b)

plastics

c)

granite

d)

Iron sulfide, FeS

41.
Which of the following ions will never have parenthesis around it in a formula?
a)
Br-1
b)
CO3-2
c)
NH4+1
d)
OH-1
42.

Which of the following is an base?

a)

HClO4

b)

CO2

c)

Mg(OH)2

d)

C2H6

43.

Which letter corresponds to the energy of the intermediate?

a)

A

b)

B

c)

C

d)

D

44.
When an atom loses an electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
45.
Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?
a)
There are 2 bromide ions for every magnesium ion
b)
Bromide has a 2- charge
c)
Bromide has a 2+ charge
d)
There are 2 magnesium ions to every bromide ion
46.
The ions in an ionic compound form an ionic bond that is held together because:
a)
The two ions have opposite charges and opposites charges attract
b)
gravity holds them together
c)
The group of atoms share electrons
d)
all compounds are neutral
47.

Sodium Hydroxide (NaOH) is a strong base. What color would Sodium Hydroxide turn if the indicator Thymophthalein was added to it?

a)

White

b)

Light blue

c)

Dark blue

48.
Li+ combines with P3-  to form
a)
LiP
b)
Li3P
c)
LiP3
d)
(Li)3P
49.
What formula results when Al+3 and PO4-3 ions bond?
a)
Al(PO3)4
b)
Al(PO4)
c)
Al(PO4)3
d)
AlPO4
50.
What formula results when Fe+3 and CO3-2 ions bond?
a)
FeCO3
b)
Fe2CO3
c)
Fe2(CO3)3
d)
Fe3(CO3)2
51.
Name NH4Cl
a)
Nitrogen Hydrogen Chloride
b)
Nitrogen Tetrahydrogen Chloride
c)
Ammonium Chloride
d)
Ammounium Calcide
52.
What is the correct formula for Strontium hydroxide?
a)
Sr(OH)2
b)
SrOH2
c)
Sr2OH
d)
(Sr)2OH
53.

Which of the following properties of this rock is a physical property?

a)

It is green

b)

It melts at 500 degrees Celsius

c)

It does not dissolve in water

d)

All properties shown are physical properties

54.

What is the charge on the copper ion in the formula: Cu2O ?

a)

+1

b)

+2

c)

+3

d)

+4

55.

What is the charge on the nickel ion in the formula: NiSO4 ?

a)

+1

b)

+2

c)

+3

d)

+4

56.

What type of a change occurs when butter melts?

a)

Chemical

b)

Physical

57.

What type of a change occurs when iron rusts?

a)

Chemical

b)

Physical

58.

Which of the following does NOT occur during a chemical change?

a)

Chemical bonds are broken and/or formed

b)

Atoms turn in to different kinds of atoms

c)

Energy is released or absorbed

d)

New substances are formed with new properties

59.

Which type of chemical reaction has the following configuration?


Hydrocarbon + Oxygen --> Carbon Dioxide + Water


CxHy + O2 --> CO2 + H2O

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

60.

Select each compound that can be produced by combustion reactions. (more than 1 answer)

a)

Oxygen

b)

Carbon Dioxide

c)

Water

d)

Glucose

e)

Carbon

61.

Classify the following chemical reaction.


Si(s) + 2Cl2(g) --> SiCl4(l)

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

62.

What is a substance that speeds up the rate of a chemical reaction?

a)

Rate

b)

Catalyst

c)

Calorimeter

d)

Hydrocarbon

63.

Identify the type of chemical reaction picture above

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

64.

Identify the type of chemical reaction picture above

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

65.

Identify the type of reaction...

C4H10 + O2 −>C_4H_{10}\ +\ O_2\ ->

a)

Composition

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

66.

Identify the type of reaction...

SnCl2 + 2Li −> 2LiCl + SnSnCl_2\ +\ 2Li\ ->\ 2LiCl\ +\ Sn

a)

Composition

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

67.

Identify the type of reaction...

(NH4)2CrO4 +2 KOH −> 2NH4OH + K2CrO4\left(NH_4\right)_2CrO_4\ +2\ KOH\ ->\ 2NH_4OH\ +\ K_2CrO_4

a)

Composition

b)

Decomposition

c)

Single Replalcement

d)

Double Replacement

e)

Combustion

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