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General Review - Chemical Reactions and Equations Playlist

Total questions: 53

Worksheet time: 45mins

Name
Class
Date
1.

Chemical reaction (Chem7.01 Lv1)

a)

a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

b)

A chemical dissolved in water to form a solution.

c)

the symbolic representation of a chemical reaction in the form of symbols and formulas.

d)

the numbers in front of the formulas in a chemical equation that gives the number of molecules (or atoms) involved in the reaction. Can also represent the number of moles of a chemical substance in a reaction.

2.

Which of the following is a type of chemical reaction? (Chem 7.01 Lv2)

a)

synthesis reaction

b)

react reaction

c)

decomposition reaction

d)

single-replacement reaction

e)

product reaction

3.

Which of the following is a type of chemical reaction? (Chem 7.01 Lv2)

a)

double-replacement reaction

b)

react reaction

c)

combustion reaction

d)

explosion reaction

e)

product reaction

4.

Which reaction type follows this pattern A + B ---> AB?(Chem 7.01 Lv2)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

5.

Which reaction type follows this pattern AB ---> A + B?(Chem 7.01 Lv2)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

6.

Which reaction type follows this pattern A + BC ---> B + AC?(Chem 7.01 Lv2)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

7.

Which reaction type follows this pattern AB + CD ---> AD + CB?(Chem 7.01 Lv2)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

8.

Which reaction type follows this pattern A + O₂---> CO₂ + H₂O?(Chem 7.01 Lv2)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

9.

What type of chemical reaction is happening in this reaction:

AgNO₃(ag) + NaCl(aq) ---> NaNO₃(aq) + AgCl(s)?

(Chem 7.01 Lv3)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

10.

What type of chemical reaction is happening in this reaction:

Cu(s) + 2AgNO₃(aq) ---> Cu(NO₃)₂(aq) + 2Ag(s)?

(Chem 7.01 Lv3)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

11.

What type of chemical reaction is happening in this reaction:

C₃H₈(g) + 5O₂(g) ---> 3CO₂(g) + 4H₂O(g)?

(Chem 7.01 Lv3)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

12.

What type of chemical reaction is happening in this reaction:

Na(s) + Cl(g) ---> NaCl(s)?

(Chem 7.01 Lv3)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

13.

What type of chemical reaction is happening in this reaction:

2NaOH(s) ---> Na₂O(s)+H₂O(g)? (Chem 7.01 Lv 3)

a)

synthesis reaction

b)

decomposition reaction

c)

single-replacement reaction

d)

double-replacement reaction

e)

combustion reaction

14.

Which of the following is a chemical equation (Chem 7.02 Lv1)

a)

Na

b)

Na+ Cl-

c)

Na + Cl ------> NaCl

d)

NaCl

15.

Reactant (Chem 7.02 Lv1)

a)

the resulting chemical compounds after a chemical reaction has taken place.

b)

the chemical compounds going into a chemical reaction.

c)

describes a certain event of the natural world, but it does not attempt to explain how or why the event occurs.

d)

a reaction in which one element is substituted for another element in a compound.

16.

Product (Chem 7.02 Lv1)

a)

the resulting chemical compounds after a chemical reaction has taken place.

b)

the chemical compounds going into a chemical reaction.

c)

describes a certain event of the natural world, but it does not attempt to explain how or why the event occurs.

d)

a reaction in which one element is substituted for another element in a compound.

17.

What side of the arrow in a chemical equation is the reactant located? (Chem 7.02 Lv2)

a)

Right

b)

Left

c)

Above arrow

d)

It is not part of a chemical equation

18.

What side of the arrow in a chemical equation is the product located? (Chem 7.02 Lv2)

a)

Right

b)

Left

c)

Above arrow

d)

It is not part of a chemical equation

19.

What does it mean when a chemical is aqueous? (Chem 7.02 Lv3)

a)

It has melted

b)

It does not dissolve in water

c)

It is dissolved in water

d)

It will only react in gas form

20.

What state of matter is HC₂H₃O₂ in for the chemical equation below?

HC₂H₃O₂(aq) + NaHCO₃(s) -----> CO₂(g) + H₂O(l) + NaC₂H₃O₂(aq)

(Chem 7.02 Lv3)

a)

Solid

b)

Liquid

c)

Gas

d)

Aqueous

21.

What state of matter is NaHCO₃ in for the chemical equation below?

HC₂H₃O₂(aq) + NaHCO₃(s) -----> CO₂(g) + H₂O(l) + NaC₂H₃O₂(aq)

(Chem 7.02 Lv3)

a)

Solid

b)

Liquid

c)

Gas

d)

Aqueous

22.

What state of matter is CO₂ in for the chemical equation below?

HC₂H₃O₂(aq) + NaHCO₃(s) -----> CO₂(g) + H₂O(l) + NaC₂H₃O₂(aq)

(Chem 7.02 Lv3)

a)

Solid

b)

Liquid

c)

Gas

d)

Aqueous

23.

What state of matter is H₂O in for the chemical equation below?

HC₂H₃O₂(aq) + NaHCO₃(s) -----> CO₂(g) + H₂O(l) + NaC₂H₃O₂(aq)

(Chem 7.02 Lv3)

a)

Solid

b)

Liquid

c)

Gas

d)

Aqueous

24.

What does the coefficient in front of the chemical compounds represent? (Chem 7.02 Lv3)

a)

Number of molecules

b)

Number of times the reaction need to happen

c)

Number of products

d)

Number of pounds of chemicals needed for the reaction

25.

What does the subscript number in a chemical formula represent? (Chem 7.02 Lv3)

a)

Number of molecules

b)

Number of times the reaction need to happen

c)

Number of atoms in a compound

d)

Number of pounds of chemicals needed for the reaction

26.
a)

That the reactions go both directions

b)

That you need to pour everything into separate beakers to make the reaction work

c)

That there are no products only reactants

d)

That there is heat applied to the chemical reaction.

27.

a)

That the reactions go both directions

b)

That you need to pour everything into separate beakers to make the reaction work

c)

That there are no products only reactants

d)

That there is heat applied to the chemical reaction.

28.

a)

That the reactions go both directions

b)

That you need to pour everything into separate beakers to make the reaction work

c)

The direction of the chemical reaction so you know what are the reactants and what are the products

d)

That there is heat applied to the chemical reaction.

29.

What is mass? (Chem 7.03 Lv1)

a)

the quantity of matter in an object.

b)

the resulting chemical compounds after a chemical reaction has taken place.

c)

The amount of space matter take-up

d)

the chemical compounds going into a chemical reaction.

30.

What does the law of conservation of mass state? (Chem 7.03 Lv2)

a)

Mass is not created nor destroyed only converted into different forms.

b)

Mass can be converted into energy if you multiply the mass by the speed of light squared

c)

Energy and mass can be created and conserved from virtually nothing

d)

It is where you are trying to save mass like conserving energy is saving energy.

31.

What is one reason we need to balance chemical equations? (Chem 7.03 Lv2)

a)

Because the teacher told me so

b)

Because the conservation of mass tells us that matter coming out of the reaction needs to equal the matter going into the reaction

c)

Because we need to have even numbers to do math with the equation

d)

Because the conservation of mass tells us that matter can be destroyed and we need to account for the loss of mass

32.

In the flowing chemical equation explain how the law of conservation of mass followed?

C₆H₁₂O₆ + 6O₂ ---> 6CO₂ + 6H₂O

(Chem 7.03 Lv3)

a)

The coefficients account for the amount of matter going into the reaction and the amount of matter coming out of the reaction. Make sure they are the same.

b)

The subscripts account for the amount of matter going into the reaction.

c)

The coefficients allow for more mass to be created

d)

The coefficients allow for more mass to be lost

33.

Which of the following is a chemical equation (Chem 7.02 Lv2, 7.04 Lv 1)

a)

K + Cl

b)

Ca²⁺ - Cl⁻

c)

AgNO₃(aq)+ NaCl(aq) ------> AgCl(s) + NaNO₃(aq)

d)

NaCl

34.

Which of the following would represent a synthesis reaction involving Magnesium and Bromine? (Chem 7.04 Lv2)

a)

Mg + Br -----> MgBr₂

b)

MgBr₂ ------> Mg + Br

c)

Mg + NaBr ----> Na + MgBr₂

d)

MgBr₂ + NaCl -----> NaBr + MgCl₂

35.

Which of the following would represent a single displacement reaction involving Copper and Silver Nitrate? (Chem 7.04 Lv2)

a)

Cu + Ag -----> CuAg

b)

AgNO₃ ------> Cu+ Cl₃

c)

AgNO₃ + Cu ------> Ag + CuNO₃

d)

AgNO₃ + CuCl₂ -----> AgCl + CuNO₃

36.

Which of the following would represent a combustion reaction of C4H10? (Chem 7.04 Lv2)

a)

C₄H₁₀ -----> C₄ + H₁₀

b)

C + H -----> C₄H₁₀

c)

C₄H₁₀ + O₂ -----> CO₂ + H₂O

d)

C₄H₁₀ + O₂ -----> CH₂ + C₂O

37.

When the equation Fe₃O₄ + Al -----> Al₂O₃ + Fe is correctly balanced, what is the coefficient of Fe? (Chem 7.04 Lv3)

a)

1

b)

2

c)

3

d)

9

38.

Which coefficients correctly balance the formula equation NH₄NO₂(s) -----> N₂(g) + H₂O(l)? (Chem 7.04 Lv3). The numbers are from left to right.

a)

1, 2, 2

b)

2 on just H2O

c)

2, 1, 1

d)

2, 2, 2

39.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
40.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
41.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
42.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
43.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
44.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
45.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
46.
What is the number before a chemical formula called?
Ex: 2H2 + O2 --> 2H2O
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
47.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
48.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
49.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
50.

When the equation H2O2 --> H2O + O2 is completely balanced, the coefficient for water is

a)

5

b)

8

c)

3

d)

2

51.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
52.

PCl5 + ___ H2O → ___ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

53.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2

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