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7-50 QZZ Test Chem Reactions

Total questions: 75

Worksheet time: 6hrs 15mins

Name
Class
Date
1.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
2.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
3.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
4.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
5.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

6.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
7.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
8.
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.
9.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
10.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
11.

How many Mn atoms are found in the following compound?

2MnO4

a)

1

b)

2

c)

4

d)

8

12.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

Yes

b)

No

13.

Which of the following equations are correctly balanced?

a)

12CO2 + H2O ---> C6H12O6 + O2

b)

CO2 + 9H2O ---> C6H12O6 + O2

c)

CO2 + H2O ---> 3C6H12O6 + O2

d)

6CO2 + 6H2O ---> C6H12O6 + 6O2

14.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

15.

How many HCl molecules do you need to balance this equation?

Mg + __HCl ---> MgCl2 + H2

a)

1

b)

2

c)

3

d)

4

16.

When balancing this equation, Fe + Cl2 → FeCl3, the correct coefficient for Cl2?

a)

1

b)

2

c)

3

d)

4

17.

Chemical reactions

a)

create and destoy atoms

b)

only occurs outside living organisms

c)

occurs only in living organisms

d)

produce new substances

18.

What does this symbol Δ above the arrow mean?

a)

a precipitate is form

b)

heat is supplied

c)

a calalyst is needed

d)

electricity is needed

19.

Balance this equation, CaCO3(s) → CaO(s) + CO2(g)?

a)

3,1,2

b)

1,1,1

c)

1,3,1

d)

2,6,3

20.

Balance this equation, AlCl3 + NaOH → Al(OH)3 + NaCl

a)

3,1,3,1

b)

1,3,3,1

c)

1,1,1,3

d)

1,3,1,3

21.

Balance the following equation: Cr(s) + Fe(NO3)2 (ag) → Fe(s) + Cr(NO3)3 (ag)

a)

2,3,3,2

b)

2,3,2,3

c)

4,6,6,2

d)

1,3,3,1

22.

Chemical equations

a)

give directions for naming compounds

b)

describe only biological changes

c)

describe chemical reactions

d)

show how to write formulas

23.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
24.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
25.
Balance the equation:
Si(OH)4+NaBr--> SiBr4+NaOH
a)
Si(OH)4+2NaBr--> SiBr4+NaOH
b)
Si(OH)4+4NaBr--> SiBr4+4NaOH
c)
Si(OH)4+NaBr--> SiBr4+4NaOH
d)
Si(OH)4+2NaBr--> SiBr4+2NaOH
26.

Which is the correct coefficient to balance this equation, NH4NO2 → N2 + H2O?

a)

1,1,2

b)

1,3,3

c)

3,2,1

d)

1,3,2

27.
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
28.
Identify this type of reaction,
Cl2 + 2KI -->  I2 + 2KCl
a)
Synthesis
b)
Single Replacement
c)
Double Replacement
d)
Decomposition
29.
Which chemical reaction breaks down into 2 substances?
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
30.
Which reaction type is the following: AgF + CaCl2 --> AgCl + CaF2
a)
Decomposition
b)
Single Replacement
c)
Synthesis
d)
Double Replacement
31.
Which reaction type is the following:  Na + CaF2 --> Ca + NaF
a)
Decomposition
b)
Single Replacement
c)
Synthesis
d)
Double Replacement
32.

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

33.

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

34.

What do the coefficients need to be in the following equation in order to be balanced?

_Al +_HCl → _H2 +_AlCl3

a)

2, 6, 3, 2

b)

it is already balanced

c)

4, 12, 3, 4

d)

2, 1, 4, 5

35.
__NaClO3 --> __NaCl + __O2
a)
2,2,2
b)
2,2,3
c)
3,2,2
d)
1,2,3
36.
What kind of reaction is this:
2H2O2 →2 H2O + O2
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Combustion
37.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
38.
Classify
Zn + H2S → ZnS + H2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
39.

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

40.

What type of chemical reaction has the following configuration?


Compound --> Substance + Substance


AB --> A + B

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

41.

Classify the following chemical reaction


BaCl2(aq) + K2CrO4(aq) --> BaCrO4(s) + 2KCl(aq)




a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

42.

Classify the following chemical reaction.


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

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

43.

Classify the follow chemical reaction.


2C6H6(l) + 15O2 --> 6H2O(l) + 12CO2(g)

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

44.

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

a)

Rate

b)

Catalyst

c)

Calorimeter

d)

Hydrocarbon

45.

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

46.

Pb(NO3)2 --> PbO + NO2 + O2

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

47.
Si + S8 --> Si2S4
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
48.
Which of these formulas contain equal numbers of nitrogen atoms?
a)
Formulas I and III
b)
Formulas I and IV
c)
Formulas II and III
d)
Formulas I, II, and V
49.
Which of the following describes a precipitate?
a)
a liquid forms when a block of metal is heated
b)
a solid forms when one liquid is poured into another
c)
a gas forms when a solid is placed in a liquid
d)
bubbles form when an acid is poured on a rock
50.
You know you a chemical reaction has occurred if 
a)
there is a precipitate.
b)
there is a color change.
c)
there is a temperature change.
d)
All of these answers are evidence.
51.

Which symbol shows a chemical reaction has occured?

a)

A

b)

B

c)

C

d)

D

52.

What state of matter is this substance?

a)

solid precipitate

b)

dissolved in water

c)

released as a gas

d)

liquid

53.

Which of the following chemical equations is correct for the word equation:

Solid magnesium is burned in oxygen gas to produce solid magnesium oxide.

a)

Mg + O2→ MgO (aq)

b)

Mg+ O→ MgO (s)

c)

Mg + CO2 → MgO (s) + C

d)

Mg(s) + O2 (g)→ MgO (s)

54.

When hydrogen reacts with sulfur, a smelly gas, dihydrogen monosulfide, is produced.

a)

H2 + S → HS

b)

H2 + S → H2S

c)

H + S→ HS

d)

H + S→ H2S

55.

Which equation below violates the law of conservation of mass?

a)

2H2+O2→2H2O2H_2+O_2\rightarrow2H_2O

b)

KCl+Br→KBr+Cl2KCl+Br\rightarrow KBr+Cl_2

c)

2Fe2O3+3C→4Fe+3CO22Fe_2O_3+3C\rightarrow4Fe+3CO_2

d)

Na2CO3+2HCl→2NaCl+H2O+CO2Na_2CO_3+2HCl\rightarrow2NaCl+H_2O+CO_2

56.

What is the following reaction?
2C2H2(g)+5O2(g)→4CO2(g)+2H2O(l)2C_2H_2(g)+5O_2(g)\rightarrow4CO_2(g)+2H_2O(l)  

a)

combustion reaction.

b)

synthesis reaction.

c)

decomposition reaction.

d)

double-displacement reaction.

57.

Hydrogen gas and nitrogen monoxide gas forms water and nitrogen gas.

a)

H2 + NO --> H2O + N2

b)

H + NO --> H2O + N

c)

H2 + N2O3 --> H2O + N2

d)

H + NO --> H2O + N2

58.

Potassium chlorate solid when heated produces potassium chloride solid and oxygen gas.

a)

KClO3 + heat --> KCl + O2

b)

PClO3 + heat --> PCl + O2

c)

KClO3 + heat --> KCl + O

d)

KCl + heat --> KCl + O2

59.

sodium phosphate and calcium chloride produce calcium phosphate and sodium chloride

a)

Na3PO4 + CaCl2 --> Ca3(PO4)2 + NaCl

b)

Na3PO4 + CaCl2 --> Ca4PO2 + NaCl

c)

NaPO4 + CaCl2 --> Ca(PO4)2 + NaCl

d)

NaPO4 + CaCl2 --> Ca2(PO4)3 + NaCl

60.

Aluminum bromide and chlorine gas produce aluminum chloride and bromine gas.

a)

AlBr3 + Cl2 --> AlCl3 + Br2

b)

AlBr3 + Cl --> AlCl3 + Br

c)

Al3Br + Cl --> Al3Cl + Br2

d)

AlBr3 + Cl2 --> AlCl3 + Br

61.

Barium metal and water yields barium hydroxide and hydrogen gas

a)

Ba + H2O --> Ba(OH)2 + H2

b)

Ba2 + H2O --> Ba(OH)2 + H

c)

Ba + H2O --> BaOH2 + H

d)

Ba2 --> Ba(OH)2 + H2

62.

Calcium oxide and water produces calcium hydroxide

a)

CaO + H2O --> Ca(OH)2

b)

Ca2O2 + H2O --> Ca(OH)2

c)

CaO + H2O --> CaOH

d)

Ca2O2 + H2O --> Ca(OH)2

63.

Aluminum and oxygen produces aluminum oxide

a)

Al + O2 --> Al2O3

b)

Al + O --> Al2O3

c)

Al3 + O2 --> Al2O3

d)

Al + O --> AlO

64.

For the formula equation 2Mg + O2 ---> 2MgO, the word equation would begin

a)

Manganese plus oxygen . . . .

b)

Molybdenum plus oxygen . . . .

c)

Magnesium plus oxygen . . . .

d)

Heat plus oxygen

65.

Name this compound Na2SO3

a)

Sodium sulfoxide

b)

Sodium sulfate

c)

Sodium sulfite

d)

Sodium sulfur oxygen

66.

Name Fe(NO3)3

a)

Iron(III) Nitrate

b)

Iron(III) Nitrite

c)

Iron Nitrite(III)

d)

Iron Nitrate

e)

Iron Oxynitride

67.

Which is the correct formula for a compound made of aluminum and hydroxide?

a)

AlOH3

b)

AlOH

c)

Al(OH)3

d)

AlOH3

68.
The correct name of Cu₃N₂ is
a)
copper (III) nitride
b)
copper (II) nitride
c)
copper nitride
d)
tricopper dinitride
69.
What is the chemical formula for Beryllium phosphide?
a)
Be3P3
b)
BeP
c)
Be2P3
d)
Be3P2
70.
What is the name of N2O3
a)
Nitrogen trioxide
b)
Dinitrogen oxide
c)
Dinitrogen trioxide
d)
Nitrogen oxide
71.
What is the name of C3Cl8 ?
a)
Carbon octachloride
b)
Tricarbon octachloride
c)
Carbon trichloride
d)
Octacarbon trichloride
72.

What is the name of Br6F10 ?

a)

Bromium fluoride

b)

Hexabromine fluoride

c)

Bromium decafluoride

d)

Hexabromine decafluoride

73.
ammonium phosphate
a)
(NH4)3PO4
b)
NPO4
c)
NH4PO4
d)
NH4(PO4)3
74.
Roman numerals tell you the ____ of the metal cation(s) in an ionic compound.
a)
number
b)
mass
c)
type
d)
charge
75.

Formula for barium sulfide

a)

B2S3

b)

BaS

c)

Ba2S

d)

BaS2

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