Free Printable GBH Chemistry Unit 5 Test Review

1.

Magnesium and oxygen react with each other and form

a)

Magnesium di oxide.

b)

Magnesium triphosphate

c)

Magnesium oxide.

d)

Magnesium Hydroxide

2.

A chemical reaction in which two or more substances combine with each other to form a single substance is called?

a)

Double displacement reaction

b)

Displacement reaction

c)

Synthesis reaction

d)

Decomposition rection

3.

The substances which combine in a chemical reaction is called?

a)

Products

b)

Reactants

c)

Combining elements

d)

Refractions

4.

Number placed in front of an element symbol or chemical formula in an equation.

a)

coefficient

b)

product

c)

reactant

d)

synthesis

5.

New substance produced by a chemical reaction.

a)

product

b)

reactant

c)

coefficient

6.

Chemical reaction in which a substance combines with oxygen and releases energy.

a)

combustion

b)

decomposition

c)

synthesis

d)

product

7.

Chemical reaction in which one compound breaks down and forms two or more substances.

a)

decomposition

b)

double replacement

c)

single replacement

d)

synthesis

8.

Describes a reaction in which the negative ions in two compounds switch places, forming two new compounds.

a)

combustion

b)

decomposition

c)

double replacement

d)

single replacement

9.

Describes a reaction in which the negative ions in two compounds switch places, forming two new compounds.

a)

combustion

b)

decomposition

c)

double replacement

d)

single replacement

10.

The chemical formula for water is H₂O. The 2 in the formula represents a

a)

A. coefficient

b)

B. element

c)

C. superscript

d)

D. subscript

11.

The chemical formula for photosynthesis is 6O₂ + 6H₂O → C₆H₁₂O₆ + 60₂. How many atoms of oxygen are found in the product?

a)

A. 2

b)

B. 6

c)

C. 8

d)

D. 18

12.

The picture shows the different stages of a slice of bread being burnt. Which of the following CANNOT be used as an evidence of a chemical change?

a)

Heat energy was absorbed during the change.

b)

The burned part of the toast did not taste good.

c)

The burned part changed color and turned black.

d)

The surface of the bread changed to carbon.

13.

During a lab experiment, a scientist numbers three beakers. Next, she pours 150 mL of liquid into each beaker. Each liquid is different.Then, the scientist adds 5 g of white solid baking soda (NaHCO₃) to each beaker and stirs. She observes the results.
In which of the beakers does the scientist observe clear evidence of a chemical reaction?

a)

beaker 1 only

b)

beaker 2 only

c)

beaker 3 only

d)

beakers 1,2, and 3

14.

Which of the following is a chemical reaction?

a)

Water freezes.

b)

Sugar dissolves in water.

c)

Salt and pepper are mixed in a dish.

d)

Iron rusts.

15.

Before a chemical reaction, the total mass of two reactants is measured to be 40 grams. After the reaction, what should be the total mass of the products?

a)

0 grams

b)

20 grams

c)

40 grams

d)

80 grams

16.

When two substances were combined, bubbles were produced and the temperature dropped. This most likely means that:

a)

a chemical reaction took place

b)

the two substances had low boiling points

c)

one substance dissolved in the other

d)

the two substances are non-reactive

17.

Which of these is not a chemical reaction?

a)

Burning of wood

b)

Milk going bad

c)

Mixing vinegar and baking soda

d)

Melting of ice

18.

Matter can not be created nor destroyed: it can only be

a)

Destroyed a little bit

b)

Invisible

c)

Transformed, changed

d)

None of the above

19.

How many oxygen atoms are in the products for the chemical reaction below?
$4Fe\ +\ 3O_{2\ }\rightarrow\ 2Fe_2O_3$

a)

2

b)

3

c)

5

d)

6

20.

Is this equation balanced or unbalanced?
H₂ + O₂ --> H₂O

a)

balanced

b)

unbalanced

21.

Copper chloride and aluminum react to produce aluminum chloride and copper. Which of the following is the correctly balanced chemical equation for this reaction?

a)

CuCl₂ + Al -> AlCl₃ + Cu

b)

3CuCl₂ + Al -> AlCl₃ + 2Cu

c)

3CuCl₂ + 2Al -> 2AlCl₃ + 3Cu

d)

CuCl₂ + 3Al -> AlCl₃ + 2Cu

22.

The first part of a balanced chemical equation is shown: H₂SO₄ + 2NaOH → ________. In order for this equation to be balanced, how many hydrogen (H) atoms must be present in the products?

a)

2

b)

3

c)

4

d)

5

23.

Copper chloride and aluminum react to produce aluminum chloride and copper. Which of the following is the correctly balanced chemical equation for this reaction?

a)

CuCl₂ + Al -> AlCl₃ + Cu

b)

3CuCl₂ + Al -> AlCl₃ + 2Cu

c)

3CuCl₂ + 2Al -> 2AlCl₃ + 3Cu

d)

CuCl₂ + 3Al -> AlCl₃ + 2Cu

24.

These are all models of the same molecule. What would this molecule look like in a chemical/molecular formula?

a)

CH

b)

C4H

c)

CH₄

d)

4CH

25.

What coefficient should go in the last blank space in order for the equation to be balanced?

a)

1

b)

2

c)

3

d)

4

26.

Which among the following is(are) double displacement

reaction(s)?

(1) Pb + CuCl₂ --> PbCl₂ + Cu

(2) Na₂SO₄+ BaCl₂ --> BaSO₄ + 2NaCl

(3) C + O₂ --> CO₂

(4) CH₄ + 2O₂ --> CO₂+ 2H₂O

a)

(a) (1) and (4)

b)

(b) (2) only

c)

(c) (1) and (2)

d)

(d) (3) and (4)

27.

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

a)

YES

b)

NO

28.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

29.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

30.

What type of reaction is the following:
$BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

31.

Which of the elements below is NOT a diatomic molecule?

a)

hydrogen

b)

helium

c)

chlorine

d)

nitrogen

32.

Which is NOT an indicator of a chemical change?

a)

temperature change

b)

formation of a precipitate

c)

shape change

d)

production of light

33.

What are the products of this reaction?
Copper II and Silver Nitrate -->

a)

Cu(NO₃)₂+Ag

b)

CuNO₃ + Ag

c)

CuAg+NO₃

d)

Cu+ AgNO₃

34.

Write a Balanced Equation for this reaction:
C₂H₄ + 2 O₂ -->

a)

C₂O₂ + H₄

b)

CO₂ + HOH

c)

CO + H

d)

2 CO₂ + 2H₂O

35.

Which of the following equations represents the balanced synthesis reaction of iron (III) and oxygen?

a)

Fe + 3 O₂ → Fe₂O₃

b)

3 Fe + 3 O₂ → 2 Fe₂O₃

c)

2 Fe + O₂ → Fe₂O₃

d)

4 Fe + 3 O₂ → 2 Fe₂O₃

36.

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

37.

Predict the product(s): H₂O -->

a)

H and O

b)

H₂ and O₂

c)

H and OH

38.

Classify
Zn + H₂S → ZnS + H₂

a)

synthesis

b)

combustion

c)

single replacement

d)

double replacement

39.

___ Na₂CO₃ + ___ Ag₃P → ___ Na₃P + ___ Ag₂CO₃

a)

3, 2, 1, 3

b)

2, 2, 2, 3

c)

3, 2, 2, 3,

d)

3, 2, 3, 2

40.

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

41.

$Double:\ KNO_3\ +\ BaSO_4\ \rightarrow$

a)

$2KNO_3\ +\ BaSO_4\ \rightarrow\ Ba\left(NO_3\right)_2\ +\ K_2SO_4$

b)

$KNO_3\ +\ BaSO_4\ \rightarrow\ Ba\left(NO_3\right)_2\ +\ K_2SO_4$

c)

$2KNO_3\ +\ 2BaSO_4\ \rightarrow\ B2aNO_3\ +\ K_2SO_4$

42.

$Double:\ BaO\ +\ Fe_2S_3\rightarrow$

a)

$3BaO\ +\ Fe_2S_3\rightarrow\ Fe_2O_3\ +\ 3BaS$

b)

$BaO\ +\ Fe_2S_3\rightarrow\ Fe_2O_3\ +\ BaS$

c)

$BaO\ +\ Fe_2S_3\rightarrow\ Fe_2O_3\ +\ 3BaS$

43.

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

44.

Based on the activity series, will this reaction occur?
Au (s) + HCl (l) →

a)

Yes

b)

No

45.

Based on the activity series, will this reaction occur?
Br₂ (l) + KI (aq) →

a)

Yes

b)

No

46.

Based on the activity series, will this reaction occur?
Ni (s) + H₂O (l) →

a)

Yes

b)

No

47.

Label the parts of the reaction.

a)

Reactants

b)

Products

1

2

1)

2)

48.

Please drag the coefficients to the proper location for this equation will be balanced.

a)

1

b)

2

c)

3

d)

4

1

2

1)

2)

GBH Chemistry Unit 5 Test Review

Total questions: 48

Worksheet time: 1hrs 14mins

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