Free Printable ReactionsReview

1.

This is a decomposition reaction.

H₂S(g) → H₂(g) + S(s)

a)

True

b)

False

2.

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

a)

Synthesis Reaction

b)

Decomposition Reaction

3.

Avery and Oliver are studying chemical reactions. They came across the equation: Cu + 2Ag(NO₃) → 2Ag + Cu(NO₃). Help them identify what type of reaction this is!

a)

Decomposition Reaction

b)

Single Displacement Reaction

c)

Double Displacement Reaction

4.

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

a)

product

b)

reactant

5.

Hey there! Rohan and Elijah are having a debate about a chemical reaction: 4 Fe + 3 O₂ → 2 Fe₂O₃. They're curious, in this reaction, what role does 3 O₂ play?

a)

product

b)

reactant

6.

Hey Nora and Ethan, can you help Charlotte figure out which generalized equation represents a synthesis reaction?

a)

A + BC → AC+ B

b)

A + B → AB

c)

AB → A + B

7.

Hey Avery, can you identify which of these equations is a decomposition reaction?

a)

A + BC → AC + B

b)

A + B → AB

c)

AB → A + B

8.

Hey there, chemistry wizards! Emma is curious about reactions. Can you help her identify which of these equations represents a single displacement reaction?

a)

A + BC → AC + B

b)

A + B → AB

c)

AB → A + B

9.

Elijah and Ava are working on a chemistry project and they need to figure out the type of reaction for: 2 NH₃+ 1 H₂SO₄ ----> 1 (NH₄)₂SO₄. Can you help them identify it?

a)

Synthesis (or combination)

b)

Single displacement

c)

Double displacement

10.

Charlotte was experimenting in her chemistry lab and mixed Pb with FeSO₄. What reaction occurred if the products were PbSO₄ and Fe?

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

11.

P₄ + 3 O₂ ----> 2 P₂O₃

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

12.

Charlotte and Ethan are studying chemical reactions. They're puzzled by a picture in their textbook. Can you help them figure out what type of reaction this picture simulates?

a)

Single Replacement

b)

Double Replacement

13.

Hey there! Zoe and Emma are curious chemists experimenting in their lab. They want to know: What type of reaction involves 2 substances combining to form 1 new compound?

a)

Single Displacement Reaction

b)

Double Displacement Reaction

c)

Synthesis Reaction

14.

What type of reaction involves one element replacing another element in a compound?

a)

Single Displacement Reaction

b)

Double Displacement Reaction

c)

Decomposition Reaction

15.

Hey there, Elijah and Arjun! Can you help Kai identify the reactants in the chemical equation shown here?

(a)

16.

Evelyn, Abigail, and Kai are studying for their chemistry exam and come across a tricky chemical reaction. Can you help them figure out what the products of this reaction are?

a)

CH₄ and CO₂

b)

CH₄ and O₂

c)

CO₂ and H₂O

d)

O₂ and H₂O

17.

During a fun science quiz, Hannah asked Henry, 'What do we call the right side of this equation?' Help Henry answer!

a)

products

b)

reactants

18.

Hey there! Scarlett was wondering about a cool type of reaction: 2 NO₂ ---> 2 O₂ + N₂. Nora thinks it's a Decomposition reaction. Abigail isn't sure. What do you think it is called?

a)

Single Replacement

b)

Decomposition

c)

Combustion

19.

Emma and Luna are studying for their chemistry test and come across this reaction:

$2HBr\ +\ Mg\left(OH\right)_2\ →\ MgBr_2\ +2H_2O$

Charlotte jumps in and asks, 'Which substance is a reactant in this equation?'

a)

$MgBr_2$

b)

$Br$

c)

Mg

d)

HBr

20.

Hey there, budding chemists! Sophia, Lily, and Olivia are exploring chemical reactions in their lab. They came across this equation:

$2Sr+O_2\ \rightarrow\ SrO$

Can you help them identify what type of reaction this is?

a)

Combination

b)

Decomposition

c)

Combustion

d)

Single-Replacement

21.

Zoe, Abigail, and Isla are studying chemical reactions and they came across this interesting equation:

$Li_3PO_4+3NaBr\rightarrow Na_3PO_4+3LiBr$

Can you help them identify what type of reaction this is?

a)

Combination

b)

Decomposition

c)

Single-Replacement

d)

Double-Replacement

22.

Hey there, science enthusiasts! Oliver, Ethan, and Mia are debating over a reaction they saw in class today. Can you help them figure it out?

$2Al_2O_3\rightarrow4Al+3O_2$

What type of reaction is this?

a)

Combination

b)

Decomposition

c)

Combustion

d)

Double-Replacement

23.

Grace was working on her chemistry homework when she stumbled upon this reaction:

$Ca+CuF_2\rightarrow CaF_2+Cu$

She's wondering, is this reaction balanced?

a)

Yes

b)

No

24.

Hey there! Anika, Luna, and Emma are studying chemical reactions and need your help. Can you tell them what type of chemical reaction this is?

$2C_8H_{18}+25O_2\rightarrow16CO_2+18H_2O$

a)

Combination

b)

Combustion

c)

Single-Replacement

d)

Double-Replacement

25.

Hey there, Evelyn and David are working on a chemistry puzzle and need your help! Can you figure out how many Oxygen atoms are in the following compound?

$2\left(NH_4\right)_3PO_4$

a)

4

b)

6

c)

8

d)

24

26.

Hey there, Emma and Benjamin are working on a chemistry puzzle and need your help! Can you figure out how many Hydrogen atoms are in the following compound?

$2\left(NH_4\right)_3PO_4$

a)

4

b)

12

c)

9

d)

24

27.

Hey there, budding chemists! Priya and Jackson are having a debate on how to perfectly balance this chemical equation. Can you help them out?

$C_4H_8+$ _ $O_2\rightarrow4CO_2+4H_2O$

a)

2

b)

4

c)

6

d)

8

28.

Evelyn is working on a chemistry experiment and needs your help! Can you figure out the missing number to balance this chemical equation?

$2Al+6HCl\rightarrow3H_2+$ _ $AlCl_3$

a)

1

b)

2

c)

4

d)

6

29.

Charlotte and Henry are working on a chemistry project and need your help! Can you figure out the correct number to balance this chemical equation?

$S_8+8O_2\rightarrow$ _ $SO_2$

a)

1

b)

4

c)

8

d)

16

30.

Hey there! Ava, Emma, and Rohan are studying organic chemistry and they need your help! Can you tell them how many Carbon atoms are in the compound shown below?

$C_4OH_{10}$

a)

1

b)

4

c)

10

d)

14

31.

Hey there, Harper and Oliver! Ready for a chemistry challenge? Let's dive into this:

$5N_2O_4$

How many Nitrogen atoms are present in the molecule above?

a)

2

b)

6

c)

10

d)

40

32.

Hey there! Anika, Liam, and Hannah are working on a chemistry puzzle and need your help. Can you tell them how many Sodium atoms are in the compound shown below?

$Na_3PO_4$

a)

3

b)

4

c)

7

d)

12

33.

Imagine Henry and Ava are in a lab, mixing up some chemicals. They start with reactants and these react to form ___________. What do they observe as the outcome?

a)

substrates

b)

catalysts

c)

combustion

d)

products

34.

Hey there, chemistry enthusiasts! Avery was working on an experiment and needs your help. What type of reaction is the following?

$2AgNO_3+Cu\ \rightarrow\ Cu\left(NO_3\right)_2+2Ag$

a)

Combination

b)

Decomposition

c)

Single-Replacement

d)

Double-Replacement

35.

Grace is working on a chemistry experiment and needs your help! She's looking at the reaction below:

$2AlPO_4\left(aq\right)+3Mg\left(s\right)\ \rightarrow\ 2Al\left(s\right)+Mg_3\left(PO_4\right)_2\left(aq\right)$

Can you tell Grace in what state of matter magnesium (Mg) is during this reaction?

a)

solid

b)

liquid

c)

gas

d)

aqueous

36.

Zoe and Arjun are working on a chemistry puzzle and need your help! They're curious about the state of matter for $AlPO_4$ in the following reaction:

$2AlPO_4\left(aq\right)+3Mg\left(s\right)\ \rightarrow\ 2Al\left(s\right)+Mg_3\left(PO_4\right)_2\left(aq\right)$

a)

solid

b)

liquid

c)

gas

d)

aqueous

37.

Hey there, chemistry whizzes! Aria was pondering over a reaction equation and noticed a '2' in front of $AlPO_4$ . She wonders, what does this '2' signify?

Here's the reaction for reference: $2AlPO_4\left(aq\right)+3Mg\left(s\right)\ \rightarrow\ 2Al\left(s\right)+Mg_3\left(PO_4\right)_2\left(aq\right)$

a)

It's the subscript, indicating the number of Al atoms present.

b)

It's the subscript, indicating the number of $AlPO_4$ molecules present.

c)

It's the coefficient, indicating the number of Al atoms present.

d)

It's the coefficient, indicating the number of $AlPO_4$ molecules present.

38.

Hey there, chemistry enthusiasts! Maya and Benjamin are working on a fun experiment and need your help. They mixed together

$NaBr\ +\ Cl_2\ \rightarrow\ ???$

What do you think the products of this reaction could be?

a)

$ClBr$ and $Na$

b)

$NaCl$ and $Br_2$

c)

$NaCl_2$ and $Br$

d)

$Na_2Br_2$

39.

Hey there! Daniel, Sophia, and Lily are having a debate about a chemistry equation. Can you help them decide if the following equation is balanced?

4Fe + 3O₂ ---> 2Fe₂O₃

a)

YES

b)

NO

40.

Hey there! Isla, Emma, and Mia were discussing a chemistry problem and need your help. Can you tell if the following equation is balanced?

Al + O₂ ---> 2Al₂O₃

a)

YES

b)

NO

41.

Benjamin and Anika are working on a chemistry project and need your help! They are combining 2 NH₃ with 1 H₂SO₄ to form 1 (NH₄)₂SO₄. What type of reaction is this?

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

42.

CaCO₃ ----> CaO + CO₂. Mason wonders, what type of reaction is this?

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

43.

Pb + FeSO₄ ----> PbSO₄ + Fe. Noah is curious about this reaction. Can you help him identify the type of reaction?

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

44.

Na₃PO₄ + 3 KOH ----> 3 NaOH + K₃PO₄. Elijah is curious about the type of reaction this represents. Can you help him identify it?

a)

Synthesis (or combination)

b)

Decomposition

c)

Single displacement

d)

Double displacement

45.

Hey there, Aria and Ethan are curious about the type of reaction shown below:
$C_{11}H_{24}+17O_2->\ 11CO_2\ +\ 12H_2O$
Can you help them figure it out?

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

46.

Oliver is experimenting in his chemistry lab and needs help! Can you balance this chemical equation for him? __Na + __Cl₂ --> __NaCl

a)

1,1,2

b)

2,1,2

c)

2,1,1

d)

already balanced

47.

Emma and Benjamin are working on a chemistry puzzle! They need to balance the equation: __H₂O₂ --> __H₂O + __O₂. Can you help them find the right coefficients?

a)

already balanced

b)

2,1,1

c)

2,2,1

d)

2,1,2

48.

Mason is working on a chemistry experiment and needs your help to balance the following equation: __NaClO₃--> __NaCl + __O₂. Can you figure out the correct coefficients to balance this chemical equation?

a)

2,2,2

b)

2,2,3

c)

3,2,2

d)

1,2,3

49.

During a fun chemistry challenge, Anika, Samuel, and Ethan are trying to balance the following chemical equation: __BF₃ + __Li₂SO₃ --> __B₂(SO₃)₃ + __LiF. Can you help them find the correct coefficients?

a)

2,3,1,3

b)

2,3,1,6

c)

4,4,2,12

d)

3,3,1,9

50.

Ethan is working on a chemistry equation: __C₆H₁₂O₆ + __O₂ --> __H₂O + __CO₂. Help him balance the equation by choosing the correct coefficients.

a)

1,6,6,6

b)

already balanced

c)

1,6,1,6

d)

2,12,12,12

51.

During a fun chemistry challenge, Daniel, Liam, and Anika are trying to balance the following reaction: _AgNO₃ + _Cu →_Cu(NO₃)₂ + _Ag. Can you help them find the correct coefficients?

a)

2 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 1 Ag

b)

2 AgNO₃ + 1 Cu → 1 Cu(NO₃)₂ + 2 Ag

c)

1 AgNO₃ + 2 Cu → 2 Cu(NO₃)₂ + 1 Ag

d)

3 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 2 Ag

52.

Nora and Daniel are working on a chemistry puzzle! They need to balance the following reaction: __(NH₄)₃PO₄ + __Pb(NO₃)₄ --> __Pb₃(PO₄)₄ + __NH₄NO₃. Can you help them find the correct coefficients?

a)

Ava thinks it's 2,1,1,6

b)

Nora suggests it might be 1,2,2,3

c)

Daniel believes it should be 4,3,1,12

d)

They all consider if it could be 4,2,1,12

53.

Mason and Abigail are debating in science class! Mason claims that in a chemical reaction, matter cannot be gained or lost, only transformed. Abigail isn't sure and thinks matter might be gained or lost. Who is correct according to the Law of Conservation of Mass?

a)

Mason is correct; matter cannot be gained or lost in a chemical reaction.

b)

Abigail is correct; matter can only be lost in a chemical reaction.

c)

Abigail is correct; matter can only be gained in a chemical reaction.

d)

Both are correct; matter can be gained and lost in a chemical reaction.

54.

Hey there! Michael, Anika, and Olivia are working on a chemistry project and need your help. Can you figure out the correct ratio of chemicals for this Balanced Chemical Equation? __Na + __H₂O --> __NaOH + __H₂

a)

2,2 --> 2,1

b)

4,4 --> 4,1

c)

1,2 --> 2,4

d)

1,2 --> 2,1

55.

Nora and Liam are having a chemistry challenge! Help them balance this equation:
2Li + Cl₂ -> LiCl

a)

2Li + Cl₂ -> 4LiCl2

b)

2Li + Cl₂ -> LiCl₂

c)

2Li + Cl₂ -> 2LiCl

56.

Balance this equation:
MgCl₂ --> Mg₄+ Cl₂

a)

It's already balanced.

b)

4MgCl₂ --> Mg₄+ 4Cl₂

c)

4MgCl₂ --> Mg₄+ 5Cl₂

57.

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__FeCl₃ + __Ca(OH)₂ --> __Fe(OH)₃ + __CaCl₂

a)

4,3--> 2,1

b)

3,2 --> 3,1

c)

2,3 --> 2,2

d)

2,3 --> 2,3

58.

Fill in the blanks with coefficient:
PCl₅+_ H₂O→_ HCl+H₃PO₄

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

59.

Balance the equation:
Si(OH)₄+NaBr--> SiBr₄+NaOH

a)

Si(OH)₄+2NaBr--> SiBr₄+NaOH

b)

Si(OH)₄+4NaBr--> SiBr₄+4NaOH

c)

Si(OH)₄+NaBr--> SiBr₄+4NaOH

d)

Si(OH)₄+2NaBr--> SiBr₄+2NaOH

60.

This type of chemical reaction has 1 product that is formed by the reaction of two or more reactants.

a)

Decomposition

b)

Synthesis

c)

Single Replacement

d)

Double Replacement

e)

Combustion

61.

This type of chemical reaction has one reactant that breaks down into two or more products.

a)

Decomposition

b)

Synthesis

c)

Single Replacement

d)

Double Replacement

e)

Combustion

62.

This type of chemical reaction involves one element replacing another element in a compound.

a)

Decomposition

b)

Synthesis

c)

Single Replacement

d)

Double Replacement

e)

Combustion

63.

This type of chemical reaction occurs when a hydrocarbon reacts with oxygen gas to form Carbon dioxide and water.

a)

Decomposition

b)

Synthesis

c)

Single Replacement

d)

Double Replacement

e)

Combustion

64.

In a chemical equation, is it true that -

a)

the reactant side and product side can have different numbers of atoms for each element

b)

there can be different elements on the reactant side and the product side

c)

an element or compound must be accompanied by a phase change

d)

the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

65.

The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?
C₆H₁₂O₆

a)

The structural arrangement of the atoms in a glucose molecule

b)

The color of a glucose molecule

c)

The size of a glucose molecule

d)

The number of atoms of each element in a glucose molecule

66.

For an investigation a student poured a blue solution of CuSO₄ into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes.
The student inferred that a chemical reaction occurred. What evidence supports this inference?

a)

A dark solid formed on the zinc metal.

b)

The zinc metal remained silver-colored and shiny

c)

The CuSO₄solution turned blue when the zinc metal was added.

d)

None of these

67.

The reactants are on the left side of the chemical equation.

a)

True

b)

False

68.

Two clear colorless solutions were combined.
The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

a)

One of the original compounds came out of solution

b)

The solutions reacted chemically

c)

Some of the water froze into ice crystals

d)

Rapid evaporation of water occurred, leaving a solid

69.

In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?

a)

H₃PO₄

b)

H₂SO₄

c)

HCIO₃

d)

H₂0

70.

How many atoms in all are in a molecule of serotonin?

C₁₀H₁₂N₂O

a)

22

b)

24

c)

25

d)

4

71.

In a ___________change, a substance changes into a different substance.

a)

Physical

b)

Chemical

72.

4Si + S₈ --> 2Si₂S₄

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

73.

3Ca + 2AlCl₃ --> 3CaCl₂+2Al

a)

Synthesis

b)

Decomposition

c)

Single diplacement

d)

Double displacement

74.

3KOH + H₃PO₄ --> K₃PO₄+3H₂O

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

75.

2Pb(NO₃)₂ --> 2PbO + 4NO₂ + O₂

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

76.

3Mg + N₂ --> Mg₃N₂

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

77.

Which chemical reaction breaks down into 2 substances?

a)

Double Replacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

78.

Which chemical reaction switches 2 elements?

a)

Double Replacement

b)

Single Replacement

c)

Combustion

d)

Decomposition

79.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

80.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

81.

What reaction has the following general formula:

AB + CD --> CB + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

82.

What reaction has the following general formula:

A + B --> AB

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

83.

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

84.

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)

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

85.

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)

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

86.

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)

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

87.

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)

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

88.

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)

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

89.

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

90.

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

91.

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

92.

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

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

93.

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

94.

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

95.

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

96.

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

97.

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

98.

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

99.

___C₃H₈ +___O₂ --> ___CO₂ + ___H₂O

a)

1,5,3,4

b)

2,10,6,8

c)

already balanced

d)

1,5,5,4

100.

__Na + __Cl₂ --> __NaCl

a)

1,1,2

b)

2,1,2

c)

2,1,1

d)

already balanced

101.

__H₂O + __CO₂ --> __C₇H₈ + __O₂

a)

4,7,1,9

b)

4,7,1,7

c)

2,3,1,3

d)

already balanced

102.

How many total atoms are represented? 4Al₂O₃

a)

2

b)

8

c)

5

d)

20

103.

A + B → AB : is the general form for which reaction type?

a)

Double Replacement

b)

Synthesis

c)

Combustion

d)

Decomposition

104.

Identify this type of reaction,
Cl₂ + 2KI_-->I₂ + 2KCl

a)

Synthesis

b)

Single Replacement

c)

Double Replacement

d)

Decomposition

105.

Which of the following is an example of synthesis?

a)

Na + Br₂--> NaBr

b)

KClO₃--> KCl + O₂

c)

HgO + Cl₂-->HgCl + O₂

d)

Cl₂ + NaBr --> NaCl + Br₂

106.

Which reaction type is the following: Na + CaF₂ --> Ca + NaF

a)

Decomposition

b)

Single Replacement

c)

Synthesis

d)

Double Replacement

107.

Balance this reaction:

____ NaF + ____ Br₂ ---> ___ NaBr + ____ F₂

a)

3,1,2,1

b)

1,2,3,4

c)

2,1,2,1

d)

1,2,1,2

108.

The red numbers in the image below represent ________

a)

subscripts

b)

coefficients

c)

I don't know, and don't want to try

d)

None of the answers are correct

109.

The blue numbers in the image below represent ________

a)

I don't know, and don't want to try

b)

coefficients

c)

subscripts

d)

none of the answers are correct

110.

The substances at the beginning of a chemical equation are called the ____

a)

product

b)

yield

c)

chemical symbol

d)

reactants

111.

In a chemical reaction, everything to the rightof the arrow is called ______________.

a)

Products

b)

Yields

c)

Molecules

d)

Reactants

112.

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

a)

1,1,1,1

b)

1,2,1,1

c)

2,1,1,2

d)

2,1,2,1

113.

Which reaction type is the following: AgF + CaCl₂ --> AgCl + CaF₂

a)

Decomposition

b)

Single Replacement

c)

Synthesis

d)

Double Replacement

114.

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

115.

In the equation, 2Mg + O₂ ---> 2MgO, which are the reactants?

a)

Mg and O

b)

MgO

c)

Mg and MgO

d)

O and MgO

116.

What are Chemical Reactions?

a)

It's when you mix substances.

b)

a process in which atoms rearrange to form new substances

c)

When something bubbles.

d)

letter and numbers showing the types and number of atoms

117.

Balance this reaction: ____ BaS + ____ PtF₂ ---> ____ BaF₂ + ____ PtS

a)

1,1,1,1

b)

1,2,1,1

c)

1,1,1,2

d)

2,1,1,1

118.

Balance this reaction: ____ C₅H₁₄ + ____ O₂ ----> ____ CO₂ + ____ H₂O

a)

1,8,5,7

b)

2,12,5,14

c)

3,27,15,24

d)

2,17,10,14

119.

What does the Law of Conservation of Mass state?

a)

Matter cannot be gained or lost in a chemical reaction.

b)

Matter can only be lost in a chemical reaction.

c)

Matter can only be gained in a chemical reaction.

d)

Matter can be gained and lost in a chemical reaction.

120.

What is the left part of a chemical equation called?
2H_{2 +}O₂ --> 2H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

121.

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

122.

How many atoms of carbon (C) are in C₆H₁₂O₆?

a)

3

b)

6

c)

12

d)

24

123.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

124.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

125.

How many Aluminum are in Al₂O₃?

a)

3

b)

2

c)

5

126.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

127.

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

a)

Yes!

b)

No!

128.

Which of the following reactions is balanced?

a)

2CH₄ + O₂ -> CO₂ + H₂O

b)

CH₄ + 2O₂ -> CO₂ + H₂O

c)

CH₄ + 2O₂ -> CO₂ + 2H₂O

d)

None of the chemical equations are balanced.

129.

Balance this equation...
HgO --> Hg + O₂

a)

It is balanced

b)

2HgO --> Hg + O₂

c)

2HgO --> 2Hg + O₂

d)

I don't know...Oh well!

130.

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

a)

1

b)

2

c)

3

d)

4

131.

Balance this equation.
_CF₄+ _Br₂-- _CBr₄+ _F₂

a)

2,1,2,1

b)

1,2,2,1

c)

1,2,1,2

d)

2,2,2,2

132.

_P₄+_O₂→ _P₂O₃

a)

3 P₄+1 O₂→ 2 P₂O₃

b)

1 P₄+1 O₂→ 2 P₂O₃

c)

1 P₄+ 3 O₂→ 2 P₂O₃

d)

1 P₄+ 2 O₂→ 3 P₂O₃

133.

_AgNO₃ + _Cu →_Cu(NO₃)₂ + _Ag

a)

2 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 1 Ag

b)

2 AgNO₃ + 1 Cu → 1 Cu(NO₃)₂ + 2 Ag

c)

1 AgNO₃ + 2 Cu → 2 Cu(NO₃)₂ + 1 Ag

d)

3 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 2 Ag

134.

_BaS + _PtF₂ → _BaF₂ + _PtS

a)

1 BaS + 1 PtF₂ → 1 BaF₂ + 1 PtS

b)

4 BaS + 2 PtF₂ → 1 BaF₂ + 1 PtS

c)

1 BaS + 2 PtF₂→ 2 BaF₂ + 2 PtS

d)

1 BaS + 3 PtF₂ →1 BaF₂ + 2 PtS

135.

_Al + _HCl →_H₂ + _AlCl₃

a)

2 Al + 2 HCl → 2 H₂ + 6 AlCl₃

b)

3 Al + 3 HCl → 6 H₂ + 2 AlCl₃

c)

1 Al + 1 HCl → 3 H₂ + 1 AlCl₃

d)

2 Al + 6 HCl → 3 H₂ + 2 AlCl₃

136.

_NaF + _Br₂ →_NaBr + _F₂

a)

1NaF + 2 Br₂ →1 NaBr + 2 F₂

b)

2NaF + 2 Br₂ → 2 NaBr + 2 F₂

c)

2 NaF + 3 Br₂ → 1 NaBr + 2 F₂

d)

2 NaF + 1 Br₂ → 2 NaBr + 1 F₂

ReactionsReview

Total questions: 136

Worksheet time: 5hrs 32mins

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