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Reactive Chemistry Topic 3

Total questions: 61

Worksheet time: 1hrs 1mins

Name
Class
Date
1.
An element plus additional element reacts to form one product is an example of which type of chemical reaction? 
a)
combustion
b)
decomposition 
c)
synthesis 
d)
single replacement
2.
Describes the number of molecules in a compound and is used to balance a chemical reaction. 
a)
coefficient 
b)
subscript
c)
superscript
d)
SI unit
3.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
4.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
5.
A chemical reaction that shows the formation of a solid and identifies the spectator ions
a)
net ionic equation 
b)
double replacement 
c)
ionic equation 
d)
dissociation 
6.
A compound is reacted and forms two new substances. What type of reaction is this? 
a)
combustion 
b)
synthesis 
c)
decomposition 
d)
single replacement 
7.
The word oxidation describes 
a)
gain of electrons
b)
loss of electrons 
c)
number of electrons remains the same
d)
number of electrons transfered
8.
The word reduction describes 
a)
gain of electrons 
b)
loss of electrons 
c)
number of electrons remains the same
d)
transfer of electrons
9.
What are the correct coefficients when this equation is balanced?
KClO3  --> KCl  +  O2
a)
2,2,2
b)
2,2,3
c)
1,2,3
d)
3,3,3
10.
When a metal reacts with oxygen gas, the product is ...
a)
metal hydroxide
b)
metal oxide
c)
metal oxide and oxygen
d)
metal hydroxide and hydrogen gas
11.
Which metal is more reactive than calcium?
a)
magnesium
b)
potassium
c)
silver
d)
aluminum
12.
When metal reacts with liquid water the products are...
a)
metal hydroxide and oxygen gas
b)
metal hydroxide and hydrogen gas
c)
metal oxide and oxygen gas
d)
metal oxide and hydrogen gas
13.
When potassium reacts with sulphuric acid, what is the name of the salt produced?
a)
Potassium Sulphide
b)
Potassium Sulphur
c)
Potassium Sulphuric
d)
Potassium Sulphate
14.
Which of the following is NOT a clue that a chemical change has occurred?
a)
change in color
b)
production of gas
c)
change in termperature
d)
change in shape
15.

Aluminium is more reactive than ....

a)

Calcium and Zinc

b)

Sodium and Gold

c)

Magnesium and Copper

d)

Lead and Iron

16.

Which metal reacts fastest with acid?

a)

Copper

b)

Iron

c)

Zinc

d)

Magnesium

17.

Iron + Hydrochloric acid --> ?

a)

iron(II) sulfate + water

b)

iron + hydrogen

c)

iron(II) chloride + hydrogen

d)

iron(II) chloride + water

18.

Which equation correctly shows the displacement of copper from copper(II) sulfate by zinc?

a)

copper + zinc sulfate --> copper(II) sulfate + zinc

b)

zinc sulfate + copper --> copper(II) sulfate + zinc

c)

copper(II) sulfate + zinc --> zinc sulfate + copper

d)

copper(II) sulfate + zinc --> zinc sulfate + water

19.

Which of the following elements will oxidize most easily?

a)

Chlorine

b)

Aluminium

c)

Hydrogen

d)

Lithium

20.

Which of the following elements is the strongest oxidizing agent?

a)

Chlorine

b)

Aluminium

c)

Hydrogen

d)

Lithium

21.

Which of the following elements is used as the standard electrode?

a)

Chlorine

b)

Aluminium

c)

Hydrogen

d)

Lithium

22.

In a galvanic cell, where does the oxidation reaction take place?

a)

circuit

b)

salt bridge

c)

cathode

d)

anode

23.

In a galvanic cell, what ensures the charges of each solution remain balanced?

a)

circuit

b)

salt bridge

c)

cathode

d)

anode

24.

A galvanic cell was created with a Calcium and a Copper cell. Which is the correct half equation at the cathode?

a)

Ca2+(aq)+2e−⟺ Ca(s)Ca^{2+}\left(aq\right)+2e^-\Longleftrightarrow\ Ca\left(s\right)

b)

Ca++e−⟺ Ca(s)Ca^++e^-\Longleftrightarrow\ Ca\left(s\right)

c)

Cu2+(aq) + e− ⟺ Cu+(aq)Cu^{2+}\left(aq\right)\ +\ e^-\ \Longleftrightarrow\ Cu^+\left(aq\right)

d)

Cu2+(aq) + 2e− ⟺ Cu(s)Cu^{2+}\left(aq\right)\ +\ 2e^-\ \Longleftrightarrow\ Cu\left(s\right)

25.

Batteries are an example of:

a)

an electrolytic cell

b)

a chemical cell

c)

electrical cells

d)

a galvanic cell

26.

Chemical reactions can be affected by

a)

temperature

b)

surface area of reactants

c)

concentration of reactants

d)

All of the above

27.

Indicators of a Chemical Change occurring include:

a)

gas bubbles

b)

color change

c)

new substance forming

d)

flame or explosion

e)

all of the above

28.

A reaction when a solid forms from two solutions is called

a)

synthesis

b)

decomposition

c)

combustion

d)

precipitation

29.

A reaction when an acid and a base react together is called:

a)

Synthesis

b)

combustion

c)

acid base reactions

d)

precipitation

30.

A chemical reaction that releases energy by light or heat is called:

a)

Exothermic

b)

Endothermic

31.

A chemical reaction that absorbs heat is called:

a)

exothermic

b)

endothermic

32.

Which statement explains why catalysts are often used in chemical reactions

a)

Catalysts increase the rate of reactions

b)

catalysts increase the yield of products

c)

catalysts increase the purity of products

d)

catalysts increase the activation energies of reactions

33.

Which one of the following is not a redox reaction?

a)

Br2 +SO2 +2H2O → SO42– +4H+ +2Br–

b)

SnCl2 + HgCl2 → Hg + SnCl4

c)

Cu2O+H2SO4 → CuSO4 +Cu+H2O

d)

2CrO42– + 2H+ → Cr2O72– + H2O

34.

Molecules or ions that contain an element with an oxidation state of +5 include

1 H2SO3

2 NO2+

3 [Cr(H2O)4Cl2]+

4 ClO3-

a)

1, 2 and 3 only correct

b)

1 and 3 only correct

NO2+

c)

2 and 4 only correct

d)

4 only correct

35.

The following reactions are spontaneous as written.


Fe(s) + Cd2+ (aq) → Fe2+ (aq) + Cd(s)

Cd(s) + Sn2+ (aq) → Cd2+ (aq) + Sn(s)

Sn(s) + Pb2+ (aq) → Sn2+ (aq) + Pb(s)


Which of the following pairs will react spontaneously?

I. Sn(s) + Fe2+ (aq)

II. Cd(s) + Pb2+ (aq)

III. Fe(s) + Pb2+ (aq)

a)

I only

b)

II only

c)

III only

d)

II and III only

36.

What is the oxidation number of chlorine in HClO?

a)

0

b)

-1

c)

+1

d)

+5

37.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

38.

What is the oxidation number of nitrogen in N2?

a)

-3

b)

0

c)

+4

d)

-1

39.
What substance is oxidized in the following reaction?
4Fe + 3O2 --> 2Fe2O3
a)
Iron
b)
Fluorine
c)
Oxygen
40.

Which of the following does not react with dilute HCl(aq)?

a)

Na2CO3

b)

Cu

c)

Zn

d)

CuO

41.

Which statement is correct for the following reaction?

a)

ClO3- is the oxidizing agent and it undergoes reduction.

b)

ClO3- is the reducing agent and it undergoes oxidation.

c)

SO2 is the oxidizing agent and it undergoes oxidation.

d)

SO2 is the reducing agent and it undergoes reduction.

42.

When solutions of two ionic compounds are combined and a solid forms, the process is called

a)

hydration

b)

solvation

c)

dissociation

d)

precipitation

43.

What is the net ionic equation for the precipitation reaction between BaCl2 and Na2SO4?

a)

BaCl2(aq) + Na2SO4(aq) --> BaSO4(s) + 2NaCl(aq)

b)

Na+(aq) + Cl-(aq) --> NaCl(s)

c)

Ba2+(aq) + SO42-(aq) --> BaSO4(s)

d)

Ba2+(aq) + 2Cl-(aq) + 2 Na+(aq) + SO42-(aq) --> BaSO4(s) + 2Cl-(aq) + 2Na+(aq)

44.

When solutions of MgCO3 and Fe2(SO4)3 are combined, what precipitate(s) forms?

a)

MgSO4

b)

neither form a precipitate

c)

MgSO4 and Fe2(CO3)3

d)

Fe2(CO3)3

45.

Identify the spectator ion(s) in the equation: 2Ag+(aq) + 2NO3–(aq) + 2Na+(aq) + S2–(aq) --> Ag2S(s) + 2Na+(aq) + 2NO3–(aq)

a)

2Ag+(aq) + 2NO3–(aq)

b)

2Na+(aq) + 2NO3–

c)

2Na+(aq) + S2–(aq)

d)

Ag2S(s) + 2Na+(aq

46.
You know you a chemical reaction has occurred if 
a)
there is a precipitate.
b)
there is a color change.
c)
there is a temperature change.
d)
All of these answers are evidence.
47.

The glow stick reaction is a

a)

Chemical change

b)

Physical change

48.

The production of carbon dioxide gas when baking soda and vinegar reacted indicated a _____________.

a)

Chemical change

b)

Physical change

49.

If potassium reacts with water what are the 2 products of the reaction?

a)

potassium hydroxide + oxygen

b)

potassium hydroxide + hydrogen

c)

potassium + hydrogen oxide

d)

Potassium hydroxide + hydrogen oxide

50.

What are the reactants if sodium hydroxide and hydrogen are made?

a)

Sodium + oxygen

b)

Sodium + hydrochloric acid

c)

Sodium + sulfuric acid

d)

Sodium + water

51.
As you move down the periodic table atoms get bigger.  This is because ____________.
a)
The atoms have more mass.
b)
The atoms have more protons.
c)
The atoms have more energy levels
d)
The atoms have more nuetrons
52.
Which of the following will have a lower ionization energy than Scandium (Sc)?
a)
Helium (He)
b)
Titanium (Ti)
c)
Calcium (Ca)
d)
Magnesium (Mg)
53.
Which of the following will have a higher ionization energy than arsenic (As)?
a)
Gallium (Ga)
b)
Neon (Ne)
c)
Antimony (Sb)
d)
Germanium (Ge)
54.

As you move from left to right on the periodic table, the number of valence electrons.......

a)

Increases

b)

Decreases

c)

Remains the same

55.

List these 3 elements in order of increasing atomic radius:


Be, F, C

a)

Be, F, C

b)

Be, C, F

c)

F, C, Be

56.

How does the number of protons in the nucleus affect the attraction between the nucleus and valence electrons?

a)

The fewer protons there are, the stronger the attraction is

b)

The more protons there are, the stronger the attraction is

c)

The number of protons will not affect the attraction between the nucleus and valence electrons

57.

Which of the properties increases down Group 14?

a)

Atomic radius

b)

Ionisation energy

c)

Melting point

d)

Electrical conductivity

58.

Which of the properties of Group 17 decreases down group?

a)

melting point

b)

electronegativitiy

c)

atomic radius

d)

solubility

59.

Ionization energy trends is . . . .

a)

becomes greater up and to the right of the periodic table.

b)

becomes greater down and to the right of the periodic table.

c)

becomes greater up and to the left of the periodic table.

d)

becomes greater down and to the left of the periodic table.

60.

Electronegativity trends is . . . .

a)

increases on passing from left to right along a period, and decreases on descending a group.

b)

increases on passing from left to right along a period, and increases on descending a group.

c)

decreases on passing from left to right along a period, and decreases on descending a group.

d)

decreases on passing from left to right along a period, and increases on descending a group.

61.

Which element has higher ionization energy?

a)

Chlorine is higher than Sodium

b)

Phosphorus is higher than Nitrogen

c)

Silicon is higher than Carbon

d)

Magnesium is higher than Aluminium

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