Free Printable Chemistry Unit Review

1.

pH of Substances

A - 1.1

B - 7.0

C - 11.7

D - 4.8

Which substance(s) is/are basic?

a)

A, C

b)

B

c)

C

d)

b, C

2.

Acid, Base or Neutral?

vinegar

a)

acid

b)

base

c)

neutral

d)

not a solution

3.

Acid, Base or Neutral?

LiOH

a)

acid

b)

base

c)

neutral

d)

not a solution

4.

Acid, Base or Neutral?

HNO2

a)

acid

b)

base

c)

neutral

d)

not a solution

5.

Acid, Base or Neutral?

lemon juice

a)

acid

b)

base

c)

neutral

d)

not a solution

6.

Acid, Base or Neutral?

H2O

a)

acid

b)

base

c)

neutral

d)

not a solution

7.

Acid, Base or Neutral?

antacid tablet

a)

acid

b)

base

c)

neutral

d)

not a solution

8.

Name HF

a)

hydrofluoric acid

b)

Hypofluoric acid

c)

hydrogen fluorine acid

d)

fluoric acid

9.

What is the formula for hydrochloric acid?

a)

HCl

b)

HClO

c)

H₃ClO₃

d)

HClO₃

10.

What is the formula for nitric acid?

a)

HNO₂

b)

HNO₃

c)

HNO₄

d)

H₂NO₃

11.

What is the formula for perchloric acid?

a)

H₃ClO₃

b)

H₃ClO₄

c)

HClO₃

d)

HClO4

12.

HNO₂

a)

hydronitrogen

b)

hydrogen nitrogen oxygen

c)

nitrous acid

d)

nitric acid

13.

Hydrogen chloride (HCl) can be formed by the following reaction: hydrogen + chlorine → hydrogen chloride Identify the symbol equation for this reaction.

a)

$2HCl(g)→H_2(g)+Cl_2(g)$

b)

$H_2(g)+Cl_2(g)+2HCl(g)$

c)

$H_2(g)+Cl_2(g)→2HCl(g)$

d)

$H_2(g)→Cl_2(g)+2HCl(g)$

14.

Jeremy writes the following symbol equation for the reaction in the previous question: $K(s)+H_2O(l)→KOH(aq)+H_2(g)$

Determine why this equation is unbalanced.

a)

There are 2 hydrogens on the reactant side and 1 oxygen on the product side

b)

There is K on the reactant side and KOH on the product side

c)

There are 2 hydrogens on the reactant side and 3 hydrogens on the product side

d)

There are 2 hydrogens on the reactant side and only 1 hydrogen on the product side

15.

Sodium metal reacts explosively with water to produce sodium hydroxide and hydrogen gas. Determine which of the following chemical equations is balanced.

a)

$Na+H_2O→NaOH+H_2$

b)

$Na+2H_2O→NaOH+H_2$

c)

$Na+H_2O→NaOH+2H_2$

d)

$2Na+2H_2O→2NaOH+H_2$

16.

Two reactants and one product

a)

decomposition

b)

single replacement

c)

synthesis

d)

combustion

17.

CxHy +O₂--> H₂O + CO₂

a)

decomposition

b)

combustion

c)

single replacement

d)

double replacement

18.

One reactant into two or more products

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

19.

One element replaces another in a compound.

a)

synthesis

b)

single replacement

c)

double replacement

d)

decomposition

20.

Which of the following chemical equations is correctly balanced? More than one answer may be correct.

a)

2 Li + O₂ → LiO₂

b)

Ag + 2 HCl → AgCl + H₂

c)

2 C₃H₆ + 9 O₂ → 6 CO₂ + 6 H₂O

d)

MgCl₂ → Mg + Cl₂

21.

Potassium (K) combines with magnesium bromide (MgBr2) to form potassium bromide (KBr) and magnesium (Mg) during a chemical reaction.

Which of the following shows the balanced chemical equation for this reaction?

a)

2K + MgBr >

2KBr + Mg

b)

2K + MgBr₂ > 2KBr + Mg

c)

K + MgBr₂ >

KBr + Mg

d)

K + MgBr₂ > KBr₂ + Mg

22.

What type of reaction equation is represented by the formula below?

AB + CD → AC + BD

a)

combustion

b)

single replacement

c)

double replacement

d)

synthesis

e)

decomposition

23.

What type of reaction equation is represented by the formula below?

A + B → AB

a)

combustion

b)

single replacement

c)

double replacement

d)

synthesis

e)

decomposition

24.

What type of reaction equation is represented by the formula below? AB → A + B

a)

combustion

b)

single replacement

c)

double replacement

d)

synthesis

e)

decomposition

25.

What type of reaction equation is represented by the formula below? AB + C → AC + B

a)

combustion

b)

single replacement

c)

double replacement

d)

synthesis

e)

decomposition

26.

Balance this equation... H₂ + Cl₂ --> HCl

a)

It is balanced

b)

H₂ + Cl₂ --> 2HCl

c)

3H₂ + Cl₂ --> 6H₂Cl

27.

Which of the following shows the correct way to balance the chemical equation?

Fe + O₂ -> Fe₂O₃

a)

4Fe+3O_{2 -->}2Fe₂O₃

b)

2Fe + 3O₂ _->Fe₂O₆

c)

4Fe+O_{6 -->}2Fe₂O₃

28.

Balance this equation. CF₄+ Br₂--> CBr₄+ F₂

a)

2,1,2,1

b)

1,2,1,2

c)

1,2,2,1

d)

2,2,2,2

29.

Find the molar mass of $H_2$

a)

1.01g

b)

2.02g

c)

1.02g

d)

2.01g

30.

Find the molar mass of $CaCO_3$

a)

100.09g

b)

100g

c)

100.2g

d)

101g

31.

Find the number of moles in 75 grams of $NaHCO_3$

a)

89mol

b)

0.90mol

c)

0.89mol

d)

84mol

32.

Find the molar mass of $NH_3$

a)

17.04g

b)

17g

c)

14.07g

d)

17.03g

33.

Calculate the mass of one mole of magnesium oxide, MgO

(a)

34.

Calculate how many moles are in 10 grams of magnesium oxide, MgO

(a)

35.

What would the mass of 2.5 moles of ethanol (C₂H₅OH) be?

(a)

36.

How many moles of sulfur dioxide (SO₂) would be in 80.125 grams? [2 d.p.]

(a)

37.

What would the mass of 1.25 moles of water be?

(a)

38.

How many moles of aluminum chloride would be found in 6.675g?

(a)

39.

How many protons are in Sodium?

a)

11

b)

22

c)

12

d)

33

40.

How many electrons are in Aluminium?

a)

40

b)

27

c)

13

d)

14

41.

How many neutrons are in Magnesium?

a)

36

b)

12

c)

24

d)

6

42.

How many neutrons are in Phosphorus?

a)

16

b)

15

c)

31

d)

46

43.

How many protons are in Chlorine?

a)

35

b)

18

c)

17

d)

52

44.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

45.

What subatomic particle changes in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

46.

What type of atom is element C?

a)

Normal atom

b)

Ion

c)

Isotope

47.

One chloride ion could react with...

a)

two magnesium ions

b)

one sodium ion

c)

one aluminum ion

d)

two lithium ions

48.

One iron(III) ion could react with...

a)

one aluminum ion

b)

one fluoride ion

c)

two sulfide ions

d)

one nitrogen ion

49.

If 17 g of sodium chloride reacts with 2 g of lithium to produce 12 g of lithium chloride, what mass of sodium is also produced?

a)

12 g

b)

7 g

c)

5 g

d)

19 g

50.

Combustion reactions are always ________, because they __________ energy.

a)

exothermic, release

b)

endothermic, release

c)

exothermic, absorb

d)

endothermic, absorb

51.

Combustion reactions always have ______ present as a _______.

a)

oxygen, product

b)

carbon dioxide, product

c)

oxygen, reactant

d)

carbon dioxide, product

52.

The name of FeCl₂ is

a)

iron chloride

b)

iron (II) chloride

c)

iron (I) chloride

d)

iron dichloride

53.

LiBr is called

a)

lithium bromine

b)

lithium (I) bromine

c)

lithium bromide

d)

lithuim (I) bromide

54.

Name the ionic compound SnSe₂

a)

Tin diselenide

b)

Tin (IV) Selenide

c)

Tin selenide

d)

Tin (II) triselenide

55.

phosphorus trichloride

a)

KCl₃

b)

PCl₃

c)

K₃Cl

d)

P₃Cl

56.

diphosphorus pentoxide

a)

P₂O₅

b)

PO₅

c)

P₅O₂

d)

P₂O₆

57.

SiCl₄

a)

silicon tetrachloride

b)

silicon quadchloride

c)

monosilicon tetrachloride

d)

silicon chloride

58.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

organisms or toxins that can cause disease in people or animals

b)

gases under pressure

c)

may cause or suspected of causing serious health effects

d)

can cause death or toxicity with short exposure to small amounts

59.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

oxidizing hazards

b)

fire hazards

c)

corrosive damage to metals, as well as skin, eyes

d)

explosion or reactivity hazards

60.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

oxidizing hazards

b)

fire hazards

c)

corrosive damage to metals, as well as skin, eyes

d)

explosion or reactivity hazards

61.

Identify the WHMIS symbol by choosing the letter of the matching description.

a)

gases under pressure

b)

organisms or toxins that can cause diseases in people or animals

c)

may cause or suspected of causing serious health effects

d)

can cause death or toxicity with short exposure to small amounts

62.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

gases under pressure

b)

organisms or toxins that can cause diseases in people or animals

c)

may cause or suspected of causing serious health effects

d)

can cause death or toxicity with short exposure to small amounts

63.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

gases under pressure

b)

organisms or toxins that can cause diseases in people or animals

c)

fire hazards

d)

explosion or reactivity hazards

64.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

oxidizing hazards

b)

fire hazards

c)

corrosive damage to metals, as well as skin, eyes

d)

explosion or reactivity hazards

65.

Fill in the blank.

Cu+ AgNO₃→ Ag + _____

a)

Cu(NO₃)₂

b)

CuNO₃

c)

CuAg

d)

Cu

66.

Predict the products of this synthesis reaction: H₂ + Cl₂ →

a)

HCl

b)

H₂Cl₂

c)

H₂Cl

d)

HCl₂

67.

Predict the products for the this reaction:

K + HCl →

a)

KCl + H₂

b)

KHCl

c)

KH + Cl₂

d)

HCl + K₂

68.

Predict the products for the this reaction:

AgNO₃ + KCl →

a)

AgCl + KNO₃

b)

AgK + ClNO₃

c)

KAg + NO₃Cl

d)

AgCl + 3 KNO

69.

Predict the products for the this reaction:

Mg + CuCl →

a)

MgCl₂ + Cu

b)

Mg + Cu

c)

MgCu + Cl₂

d)

MgCl + Cu₂

70.

What are the products of this reaction:

C₂H₄ + O₂ →

a)

C₂O₂ + H₄

b)

CO₂ + H₂+ O₂

c)

CO + H

d)

CO₂ + H₂O

71.

Endothermic reactions ________ the temperature and feel _____.

a)

decrease, cold

b)

decrease, hot

c)

increase, cold

d)

increase, hot

72.

Exothermic reactions ________ the temperature and feel _____.

a)

decrease, cold

b)

decrease, hot

c)

increase, cold

d)

increase, hot

73.

In order to neutralize an acid, what must be added?

a)

a stronger acid

b)

a weaker acid

c)

a base

d)

water

74.

A compound has high conductivity, turns red litmus red and blue litmus red. The compound could be...

a)

HCl

b)

NaOH

c)

LiCl

d)

NH3

75.

A compound has high conductivity, turns red litmus red and blue litmus blue. The compound could be...

a)

HF

b)

Mg(OH)2

c)

CaF2

d)

NH3

76.

A compound has high conductivity, turns red litmus blue and blue litmus blue. The compound could be...

a)

HNO3

b)

Mg(OH)2

c)

CaF2

d)

CH3OH

77.

A compound has no conductivity, turns red litmus blue and blue litmus red. The compound could be...

a)

CH3COOH

b)

KOH

c)

MgS

d)

C12H22O11

Chemistry Unit Review

Total questions: 77

Worksheet time: 1hrs 9mins

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