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2nd 9wks Exam Review

Total questions: 25

Worksheet time: 30mins

Name
Class
Date
1.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
2.

What type of reaction is the equation C + O2 → CO2?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Replacement Reaction

d)

Double Replacement Reaction

3.

What type of reaction is the equation 2NaCl →2Na +Cl2?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Replacement Reaction

d)

Double Replacement Reaction

4.

What type of reaction is the equation Cu + 2Ag(NO3) → 2Ag + Cu(NO3)

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Replacement Reaction

d)

Double Replacement Reaction

5.

What type of reaction is the equation Ca3(PO4)2 + 3 H2SO4 → 3 CaSO4 + 2 H3(PO4)

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Replacement Reaction

d)

Double Replacement Reaction

6.

What reaction has the following general formula:
 CxHy + O2 −>CO2 + H2OC_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

7.
In a ____ reaction, an acid and a base produce a salt and a water. 
a)
concentrated
b)
decomposition
c)
dilute
d)
neutralization
8.

Complete the following reaction:

HCl + Mg(OH)2 -->

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

9.
What reaction type is characterized by the reactant breaking down as the reaction progresses?
a)
Synthesis
b)
Decomposition
c)
Combustion
d)
Double Replacement
10.
What type of reaction is displayed below?
HCl + NaOH → NaCl + H2O
a)
Neutralization
b)
Combustion
c)
Double Replacement
d)
Decomposition
11.
The Law of Conservation of Mass states
a)
that matter exists in all states and reacts the same
b)
that matter can only be changed into new substances by introducing a catalyst
c)
that matter exists in the same state throughout any chemical change
d)
that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
12.

Precipitation reactions: when chemicals in a solution react to form ___

a)

a gas

b)

a liquid

c)

a solid

d)

rain

13.
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
14.
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
15.
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
16.
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
17.
2HI --> H2 + I2
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
18.
FeS + HCl --> H2S + FeCl2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
19.

HCl + NaOH --> NaCl + H2O

a)

single replacement

b)

double replacement

c)

combustion

d)

neutralization

20.

What law governs the balancing of chemical equations?

a)

Law of Energy

b)

Law of Conservation of Matter/Mass

c)

Law of Gravity

d)

Law of Matter Movement

21.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

22.

What are the coefficients that would properly balance this equation?

__Ca + __H2O --> __Ca(OH)2 + __H2

a)

2,1 --> 2,1

b)

1,2 --> 1,1

c)

1,2 --> 2,4

d)

1,2 --> 2,1

23.

Determine the coefficients to make the following equation balanced?

__N2 + __O2--> __NO

a)

1, 1, 1

b)

1, 1, 2

c)

2, 2, 2

d)

1, 2, 2

24.

Determine the coefficients to balance the equation.

__Al +__HCl --> __H2 +__AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

25.
Which number should go in the blank?
Mn + _ HNO3 → Mn(NO3)2 + H2
a)
1
b)
2
c)
3
d)
0

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