Free Printable Identifying Types of Chemical Reactions

1.

Which type of chemical reaction is shown?

a)

double replacement

b)

composition

c)

combustion

d)

decomposition

2.

Which type of reaction can be recognized by the general pattern?

a)

combustion

b)

single replacement

c)

composition

d)

decomposition

3.

What is the correct ratio of coefficients to balance this chemical equation?

a)

1:2:3

b)

1:2:1:5

c)

2:4:3

d)

1:1:2

4.

Which type of reaction is Al + O₂ → Al₂O₃?

a)

composition

b)

decomposition

c)

single replacement

d)

combustion

5.

Aluminum (Al) has three electrons in its outer shell. Oxygen (O) needs two electrons to complete its outer shell. What is the chemical formula for aluminum oxide?

a)

AlO

b)

AlO₂

c)

Al₂O

d)

Al₂O₃

6.

Identify the type of chemical reaction demonstrated by this equation:
KClO₃ → KCl + O₂

a)

decomposition

b)

combustion

c)

compositions

d)

single replacement

7.

Which type of chemical reaction is this an example of?
Fe₂(SO₄)₃ + KOH → K₂SO₄ + Fe(OH)₃

a)

composition

b)

double replacement

c)

single replacement

d)

combustion

8.

Identify the type of reaction shown by this chemical equation:
Al + HCl → AlCl₃ + H₂

a)

single replacement

b)

composition

c)

double replacement

d)

decomposition

9.

Which is the correctly balanced equaition?

a)

Cl₂ + 2NaI → 2NaCl + I₂

b)

Cl₂ + 2NaI → NaCl + 2I₂

c)

Cl₂ + NaI → NaCl + I₂

d)

2Cl₂ + NaI → 2NaCl + I₂

10.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

11.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

12.

What reaction has the following general formula:

AB + CD --> CB + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

13.

What reaction has the following general formula:

A + B --> AB

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

14.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

15.

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)

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

16.

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)

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

17.

What is the general reaction scheme for a combination reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

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

18.

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)

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

19.

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)

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

20.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

21.

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

22.

What type of reaction is the following:
$C_{11}H_{24}+17O_2->\ 11CO_2\ +\ 12H_2O$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

23.

What type of reaction is the following:
$2KI\ ->\ 2K\ +\ I_2$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

24.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

25.

What type of reaction is the following:
$Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

26.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

27.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

28.

What type of reaction is the following:
$Na_2S\ +2HCl\ ->\ H_2S+2NaCl$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

29.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

30.

CxHy +O₂--> H₂O + CO₂

a)

Decomposition

b)

Double replacement

c)

Combustion

d)

Single Replacement

31.

One reactant into several products.

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

32.

One element replaces another in a compound.

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Double Replacement

33.

This pictures simulates what type of reaction?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

34.

KOH + H₃PO₄ --> K₃PO₄+H₂O

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

35.

Si + S₈ --> Si₂S₄

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

36.

Pb(NO₃)₂ --> PbO + NO₂ + O₂

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Combustion

37.

What is the left part of a chemical equation called?
H_{2 +}O → H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

38.

3 Pb + 2 H₃PO₄ ----> 3 H₂ + 1 Pb₃(PO₄)₂

a)

Synthesis (or combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

39.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H₂O

40.

Combining substances to form a new substance

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Oxidation

41.

Breaking down a substance into simpler substances

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Oxidation

42.

Combining a substance with oxygen

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Oxidation

43.

Switching one substance for another

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Oxidation

44.

Having to do with heat

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Thermic

45.

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

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

46.

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

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

47.

Cu + 2Ag(NO₃) → 2Ag + Cu(NO₃)

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

48.

Which of the following is an example of a chemical change?

a)

melting a stick of butter

b)

dissolving salt in water

c)

using magnesium to displace hydrogen gas from water

49.

Consider the chemical equation CH₄ + 2 O₂ → CO₂ + 2 H₂O. In this equation, CH₄ is a

a)

product

b)

reactant

c)

displacement

50.

Consider the equation 4 Fe+3 O₂ → 2 Fe₂O₃ . In this equation, 3 O₂ is a

a)

product

b)

reactant

c)

compound

51.

Which of the following is an example of a physical change to matter?

a)

rusting

b)

digestion

c)

freezing

52.

Photosynthesis is a chemical reaction that involves the production of glucose (sugar) from carbon dioxide and water in the presence of sunlight. Photosynthesis is what kind of reaction?

a)

Exothermic

b)

Endothermic

c)

Decomposition

53.

During an endothermic reaction, what happens to energy in relation to the surroundings?

a)

released to

b)

absorbed from

c)

mixed with

54.

During an exothermic reaction, what happens to energy in relation to the surroundings?

a)

released to

b)

absorbed from

c)

mixed with

55.

In a cold pack, which type of reaction draws heat from the surroundings?

a)

exothermic

b)

endothermic

c)

exergonic

Identifying Types of Chemical Reactions

Total questions: 55

Worksheet time: 41mins

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