Free Printable Chemistry Test #5 Review

1.

What reaction has the following general formula:

AB --> A + B

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

2.

What reaction has the following general formula:

A + CD --> C + AD

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

3.

What reaction has the following general formula:

AB + CD --> CB + AD

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

4.

What reaction has the following general formula:

A + B --> AB

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

5.

What reaction has the following general formula:
$C_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O$

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

6.

What is the general reaction scheme for a single replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

7.

What is the general reaction scheme for a combustion reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

8.

What is the general reaction scheme for a synthesis reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

9.

What is the general reaction scheme for a double replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

10.

What is the general reaction scheme for a decomposition reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

11.

What type of reaction is the following:
$Ag_3N\ +\ 3HBr->3AgBr+H_3N$

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

12.

What type of reaction is the following:
$2C_4H_{10}\ +13O_2\ ->\ 8CO_2+10H_2O$

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

13.

What type of reaction is the following:
$3CuS\ +2Al\ ->\ Al_2S_3+3Cu$

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

14.

What type of reaction is the following:
$2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

15.

What type of reaction is the following:
$2H_2+O_2->2H_2O$

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

16.

___C₃H₈ +___O₂ --> ___CO₂ + ___H₂O

a)

1,5,3,4

b)

2,10,6,8

c)

already balanced

d)

1,5,5,4

17.

__Al + __Fe₃N₂ -->__AlN + __Fe

a)

already balanced

b)

4,2,4,6

c)

2,1,2,3

d)

1,2,1,3

18.

__NaClO₃--> __NaCl + __O₂

a)

2,2,2

b)

2,2,3

c)

3,2,2

d)

1,2,3

19.

__BF₃ + __Li₂SO₃ --> __B₂(SO₃)₃ + __LiF

a)

2,3,1,3

b)

2,3,1,6

c)

4,4,2,12

d)

3,3,1,9

20.

If an element is diatomic it should have a subscript of___

a)

1, always

b)

2, only when it is an element

c)

it shouldn't have a subscript, it should have a coefficent

d)

2, when bonded in a compound

21.

What is the charge of Iron in this compound. (Hint: think swap drop method):

Fe₃(PO₄)₂

a)

3+

b)

2+

c)

1+

d)

6+

22.

The symbol for a substance dissolved in solution is ______

a)

(s)

b)

(l)

c)

(aq)

d)

(g)

23.

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO₃→ Ag + _____

a)

Cu(NO₃)₂

b)

CuNO₃

c)

CuAg

d)

Cu

24.

Predict the products for the this Single Replacement reaction:

K + HCl →

a)

KCl + H₂

b)

KHCl

c)

KH + Cl₂

d)

HCl + K₂

25.

Predict the products for the this Double Replacement reaction:

AgNO₃ + KCl →

a)

AgCl + KNO₃

b)

AgK + ClNO₃

c)

KAg + NO₃Cl

d)

AgCl + 3 KNO

26.

Predict the product of this synthesis reaction:

Al + S₈ →

a)

AlS

b)

AlS₈

c)

Al₂S

d)

Al₂S₃

27.

Predict the products for the decomposition of aluminum oxide, Al₂O₃ →

a)

Al + O₂

b)

O + Al₂

c)

Al₂+ O₃

d)

Al + O

28.

What are the products of this reaction:

C₂H₄ + O₂ →

a)

C₂O₂ + H₄

b)

CO₂ + H₂+ O₂

c)

CO + H

d)

CO₂ + H₂O

29.

KBr

a)

Soluble

b)

Insoluble

30.

Silver Iodide

a)

Soluble

b)

Insoluble

31.

NiCl₂

a)

Soluble

b)

Insoluble

32.

K₂CO₃

a)

soluble

b)

insoluble

33.

NH₄NO₃

a)

soluble

b)

insoluble

34.

Which of these is always soluble?

a)

Nitrates

b)

Phosphates

c)

Carbonates

d)

Hydroxides

35.

2H₂ + O₂ → 2H₂O
How many moles of oxygen are consumed if 8 moles H₂ are used?

a)

2

b)

4

c)

6

d)

8

36.

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

a)

3mol Mg / 2 mol Fe

b)

2 mol Mg/ 3 mol Fe

c)

1 mol Fe/ 2 mol Fe

d)

3 mol MgO / 2 mol Fe

37.

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

a)

6.7 mol

b)

1.0 mol

c)

10.1 mol

d)

4.5 mol

38.

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

a)

5.2 g

b)

2.6 g

c)

690 g

d)

45 g

39.

Cl₂ + 2 KBr → Br₂ + 2 KCl

How many grams of potassium chloride can be produced from 106 g of chlorine and 356 g of potassium bromide?

a)

749 g

b)

223 g

c)

479 g

d)

814 g

40.

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

a)

13.7 mol

b)

2.75 mol

c)

6.11 mol

d)

6.85 mol

41.

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)
12.00 moles of NaClO₃ will produce how many grams of O₂?

a)

256 g of O₂

b)

576 g of O₂

c)

288 g O₂

42.

B₂H₆ + 3O₂ -->2 HBO₂ + 2 H₂O
What mass of O₂ will be needed to burn 36.1 g of B₂H₆?

a)

13.8 g O₂

b)

3.86 mol of O₂

c)

124 g O₂

43.

4 Al + 3 O₂ –> 2 Al₂O₃ How much aluminum would be needed to completely react with 45 grams of O₂?

a)

1.05 moles

b)

3.75 moles

c)

1.875 grams

d)

1.875 moles

44.

How many liters of N₂, at STP, will react with 53.0 g H₂ to form ammonia?

N₂ + 3H₂ --> 2NH₃

a)

396 L

b)

17.6 L

c)

196 L

d)

588 L

45.

How many liters of SO₂ will be produced from 55.0 L of O₂ at STP?

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

a)

55.0 Liters

b)

36.7 Liters

c)

18398 Liters

d)

2.45 Liters

46.

In a chemical reaction, the mass of reactants ___.

a)

is less than the mass of products

b)

is greater than the mass of products

c)

has no relationship to the mass of products

d)

is equal to the mass of products

47.

What is the measured amount of a product obtained from a chemical reaction performed in a lab or experiment?

a)

mole ratio

b)

theoretical yield

c)

percentage yield

d)

actual yield

48.

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

a)

theoretical yield

b)

mole ratio

c)

actual yield

d)

percentage yield

49.

A chemist interested in the efficiency of a chemical reaction would calculate the

a)

mole ratio

b)

rate of reaction

c)

percent yield

d)

energy released

50.

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

90.4%

b)

104%

c)

96.15%

d)

1.04%

51.

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

a)

1.16%

b)

116%

c)

85%

d)

76%

52.

P₄+ 6Cl₂--> 4PCl₃The reaction of 75.0g P₄ with excess chlorine gas produces 110g PCl₃in lab. Find the theoretical yield and calculate percent yield for the reaction.

a)

78%

b)

64%

c)

27%

d)

33%

53.

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%

54.

Lead nitrate can be decomposed by heating. What is the % yield of the decomposition reaction if 7.4g Pb(NO₃)₂ are heated to give 4.1 g PbO?
2Pb(NO₃)_{2 (s)}→2PbO_(s)+4NO_2(g)+O_2(g)

a)

82%

b)

44%

c)

56%

d)

67%

55.

What is the formula for percent yield?

a)

$\frac{Actual}{Theoretical}\times100$

b)

$\frac{Theoretical}{Actual}\times100$

c)

$\frac{Actual\times Theoretical}{100}$

d)

$\frac{100}{Actual\times Theoretical}$

Chemistry Test #5 Review

Total questions: 55

Worksheet time: 9hrs 1mins

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