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Year 11 Chemistry Mock Close the Gap

Total questions: 132

Worksheet time: 1hrs 27mins

Name
Class
Date
1.

Who arranged the known elements into horizontal rows of increasing atomic mass leaving gaps for as yet undiscovered elements?

a)

Mendeleev

b)

Meyer

c)

Newlands

d)

Moseley

2.
How are elements on the periodic table arranged by?
a)
in alphabetic order
b)
simular physical & chemical properties
c)
their symbols
d)
Just simular physical properties
3.
Each column in the periodic table is called a _________ .
a)
period
b)
group
c)
cluster
d)
unit
4.
Elements that are arranged in __________ have the most similar physical and chemical properties to each other.
a)
periods
b)
groups
5.
Periods on the periodic table are __________.
a)
Horizontal Rows
b)
Vertical Columns
6.
Groups on the periodic table are __________.
a)
Horizontal Rows
b)
Vertical Columns
7.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
8.
Sodium (Na) is found in period 
a)
3
b)
2
c)
4
d)
1
9.
Sodium (Na) is found in group 
a)
1
b)
2
c)
3
d)
4
10.
The atomic number tells you what?  READ THE ANSWERS CAREFULLY
a)
only the number of electrons
b)
 only the number of protons
c)
only the number of neutrons
d)
the number of both electrons and protons in an atom.
11.
What does the atomic mass tell you? 
a)
Basically,the number of electrons and protons
b)
The number of neutrons
c)
Basically, the number of protons and neutrons
d)
The number of protons.
12.

neutron

a)

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

b)

not able to conduct heat or electricity, little to no metallic luster

c)

A subatomic particle that has a negative charge

d)

A small particle in the nucleus of the atom, with no electrical charge

13.

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

a)

Proton

b)

elecrtron

c)

groups

d)

neutrons

14.

A subatomic particle that has a negative charge

a)

nobles gases

b)

protons

c)

electrons

d)

neutrons

15.
How did Mendeleev arrange the elements?
a)
alphabetical 
b)
density
c)
melting point
d)
atomic mass
16.

Which color on the image of the periodic table corresponds with the noble gases.

a)

red

b)

black

c)

blue

d)

orange

17.

Which color on the image of the periodic table corresponds with the halogens.

a)

red

b)

black

c)

blue

d)

orange

18.

Mendeleev first ordered the periodic table of elements by increasing

a)

atomic number

b)

atomic mass

c)

atomic symbol

d)

atomic weight

19.

How are the elements arranged on the periodic table today?

a)

By atomic mass

b)

By number of electrons

c)

By atomic number

d)

By alphabetic order

20.
Why did Mendeleev leave blanks in his periodic table?
a)
forgot elements
b)
left room for elements not yet discovered
c)
placed elements in wrong positions leaving gaps
21.
The usefulness of Mendeleev's periodic table was confirmed by
a)
the discovery of electrons
b)
the discovery of predicted elements
c)
its immediate acceptance by scientists
d)
the discovery of the nucleus
22.

What happens to the number of shells as you move down a group?

a)

They decrease by 1

b)

They increase by 1

c)

Nothing

23.

As you move left to right on a row or period what happens?

a)

Atomic number increases by 1

b)

Electrons decrease

c)

Number of shells decrease

d)

Nothing

24.

Mendeleev's genius was his ability to

a)

predict elements that were not discovered yet

b)

organize elements by their mass

c)

had an element named after himself

d)

organize elements by properties

25.

Elements in the same group have __________

a)

Similar Properties

b)

Same number of shells

c)

Similar Mass

26.
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
a)
Atoms
b)
Parts
c)
Molecules
d)
Hydrogen
27.
In the Thomson Model, he discovered the existence of what particle?
a)
Electrons
b)
Protons
c)
Neutrons
d)
Quarks
28.
According to the Bohr Model, electrons are only found in specific orbits around the nucleus called __________________________
a)
Energy Levels
b)
Electron Lanes
c)
Electron Places
d)
Atomic Mass
29.
The nucleus is made up of protons and what other particle?
a)
Electrons
b)
Nothing else
c)
Neutrons
d)
Atomic Number
30.
Which model of the atom proposed that atoms were positive spheres with negative electrons in them?
a)
Heliocentric Model
b)
Solid Sphere Model
c)
Plum Pudding Model
d)
Planetary Model
31.

Who was the Greek philosopher who called the smallest particle of matter as "atom"?

a)

Democritus

b)

Aristotle

c)

J.J Thompson

d)

Einstein

32.
What did James Chadwick discover?
a)
neutrons
b)
electrons
c)
the atomic theory
d)
protons
33.
Which scientist developed the plum pudding/chocolate chip cookie model
a)
Dalton
b)
Thompson 
c)
Rutherford
d)
Democritus
34.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
35.
This number gives the number of protons in each atom of an element.
a)
mass number
b)
atomic number 
c)
atomic mass
36.

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

a)

Atom is mostly empty space

b)

The nucleus is positively charged

c)

The atom has a small dense nucleus

d)

All answers are correct

37.

Which scientist discovered the electrons?

a)

Dalton

b)

Thomson

c)

Atristotle

d)

Bohr

38.
What particle was used in the gold foil experiment?
a)
Beta Particle
b)
Alpha particle
c)
Gamma ray 
39.
Most of the alpha particles went straight through the gold foil.  This suggested that....
a)
There is no interference between alpha and gold.
b)
Most of the atom is made up of empty space.
c)
The alpha particles were very tiny.
d)
None of the above
40.
Some of the alpha particles fired at the gold foil were deflected at angles.  This was due to...
a)
reflection of the alpha source when it it the fluorescent screen.
b)
The alpha particles hitting the gold nucleus.
c)
Repulsion forces between the positively charged nucleus and the positively charged alpha particles. 
d)
A mis-firing of the alpha source
41.
What did the Plum pudding model suggest about the structure of atoms?
a)
That neutrons and electrons were arranged in a sphere.
b)
 that is was a sphere of positive charge throughout which the electrons were distributed
c)
That an atom was filled with neutrons, protons and a sphere of negative charge. 
d)
That neutrons, protons and electrons were distributed throughout a sphere.
42.
The alpha particle scattering experiment by Rutherford
a)
gave rise to the nuclear model of the atom
b)
is the reason we think electrons have a negative charge
c)
was carried out using thick metal foils
d)
lead to the idea that all matter was made of indivisible atoms
43.

Which model of the atom is denoted as the "plum pudding" model?

a)

A

b)

B

c)

C

d)

D

e)

E

44.

What subatomic particle represents the "plums" in the "plum pudding" model?

a)

neutrons

b)

protons

c)

electrons

45.

Who is credited with developing model D?

a)

Thomson

b)

Dalton

c)

Bohr

d)

Rutherford

46.

Which of the following statements are true about the nucleus?

a)

It is neutrally charged

b)

It is positively charged

c)

It contains most of the mass of the atom

d)

It is almost empty space

47.
Ernest Rutherford discovered that atoms were mostly _________________. 
a)
negatively charged
b)
positively charged
c)
electrons
d)
empty space. 
48.
What did Ernest Rutherford discover when he shot particles at gold foil?
a)
Electrons
b)
Protons
c)
Neutrons
d)
A tiny, dense, positively charged nucleus 
49.
How did Rutherford describe the nucleus?
a)
Tiny
b)
Dense
c)
Positively Charged
d)
all of the above
50.
Almost all of the mass of an atom is found in what part?
a)
The electron cloud
b)
The nucleus
c)
The protons
d)
The charge
51.
Rutherford’s gold foil scattering experiment indicated that 
a)
the nucleus of an atom occupies most of an atom’s volume
b)
positive charges are dispersed throughout the atom.
c)
positive charges are concentrated in a very small core at the atom’s center
d)
protons and neutrons are located in the nucleus.
52.

Which of the "Halogens" is found in liquid state at room temperature?

a)

Flourine

b)

Astatine

c)

Iodine

d)

Bromine

53.

Which of the "Halogens" has yellowish green color?

a)

Chlorine

b)

Bromine

c)

Flourine

d)

Iodine

54.

Which of the "Halogens" could able to make the strongest ionic bond with Sodium metal?

a)

Iodine

b)

Bromine

c)

Chlorine

d)

Flourine

55.

Which "Halogen" can able to replace Chlorine in Sodium Chloride?

a)

Flourine

b)

Bromine

c)

Iodine

d)

Astatine

56.

Which of the "Halogens" is produced in electrolysis of brine solution?

a)

Chlorine

b)

Flourine

c)

Iodine

d)

Bromine

57.

Which of these elements are Halogens?

a)

Fluorine

b)

Helium

c)

Zinc

d)

Bromine

58.

What group are the Halogens?

a)

6.9

b)

7

c)

8

d)

3

59.

As you move down the group, halogens' reactivity...

a)

increases

b)

decreases

c)

doesn't change

d)

shows no trend.

60.

The nucleus of which halogen is best at attracting electrons?

a)

fluorine

b)

iodine

c)

bromine

d)

chlorine

61.
What type of ions do the Group 7 elements make?
a)
positive 2 (+2)
b)
positive 1 (+1)
c)
negative 1 (-1)
d)
negative 2 (-2)
62.

How could you test for chloride ions and what would the result be?

a)

Add silver nitrate, obtain a cream precipitate.

b)

Add silver carbonate, obtain a cream precipitate.

c)

Add sodium hydroxide, obtain a white precipitate.

d)

Add silver nitrate, obtain a white precipitate.

63.

Which halogens can displace bromide ions to make bromine?

a)

Fluorine and iodine.

b)

Fluorine and bromine.

c)

Fluorine and chlorine

d)

Chlorine and iodine.

64.

Would a displacement reaction occur for Bromine + Potassium Iodide?

a)

Yes

b)

No

c)

Maybe

65.

What is the trend for melting and boiling points of halogens?

a)

Increases down the group.

b)

Decreases down the group.

c)

Increases up the group.

d)

Decreases up the group.

e)

There's no trend.

66.

What happens at the anode during electrolysis?

a)

Negative ions gain electrons

b)

Positive ions gain electrons

c)

Negative ions lose electrons

d)

Positive ions lose electrons

67.

In the electrolysis of molten lead bromide, what is the product at the anode?

a)

Lead

b)

Bromine

c)

Oxygen

68.

In the electrolysis of copper nitrate solution, what is the product at the cathode?

a)

Oxygen

b)

Hydrogen

c)

Copper

69.

In the electrolysis of a solution, which ions from water are attracted to the anode?

a)

Hydroxide, OH-

b)

Oxide, O2-

c)

Hydrogen, H+

70.

In the electrolysis of sodium chloride solution, what is the product at the cathode?

a)

Hydrogen

b)

Sodium

c)

Chlorine

71.

What is reduction?

a)

Adding oxygen

b)

Losing electrons

c)

Gaining electrons

72.

Which half equation represents the reaction at the cathode in the electrolysis of molten copper chloride?

a)

2Cl- → Cl2 + 2e-

b)

Cu2+ + 2e- → Cu

c)

2H+ + 2e- → H2

73.

Which half equation represents a reaction at the cathode in the electrolysis of aqueous sodium nitrate?

a)

Na+ + e- → Na

b)

2H+ + 2e- → H2

c)

4OH- → 2H2O + O2 + 4e-

74.

In electrolysis, what is the name of the positive electrode?

a)

Electrolyte

b)

Cathode

c)

Anode

75.

What happens at the cathode during electrolysis?

a)

Negative ions gain electrons

b)

Positive ions gain electrons

c)

Negative ions lose electrons

d)

Positive ions lose electrons

76.

What type of compound are electrolytes?

a)

Ionic compounds

b)

Covalent compounds

c)

Metallic compounds

77.

Molten ionic compounds can be electrolysed because

a)

The ions move freely

b)

The atoms move freely

c)

The ions cannot move freely

78.

Bauxite contains:

a)

Aluminium oxide

b)

Copper oxide

c)

Copper sulphate

d)

Aluminium sulphate

79.

Aluminium oxide is mixed with __________ to lower its melting point:

a)

Bauxite

b)

Cryolite

c)

Carbon

80.

Why is Aluminium oxide mixed with cryolite?

a)

To lower its melting point

b)

To help it dissolve

c)

To increase its melting point

81.

Aluminium ions gain _________ electrons to become aluminium atoms

a)

1

b)

2

c)

3

82.

The anode is made of carbon so needs to be replaced regularly as:

a)

It reacts with aluminium to produce aluminium carbon

b)

It reacts with oxygen to produce carbon dioxide

83.

Metal ions lower in the reactivity series will form at the cathode first

a)

True

b)

False

84.

Oxygen will form at the anode if halide (GRROUP 7) ions are NOT present

a)

True

b)

False

85.

Test for hydrogen gas:

a)

Relights glowing splint

b)

Damp blue litmus paper goes white

c)

Lit splint produces squeaky pop

d)

Limewater goes cloudy

86.

Test for oxygen gas:

a)

Relights glowing splint

b)

Damp blue litmus paper goes white

c)

Lit splint produces squeaky pop

d)

Limewater goes cloudy

87.

Test for chlorine gas:

a)

Relights glowing splint

b)

Damp blue litmus paper goes white

c)

Lit splint produces squeaky pop

d)

Limewater goes cloudy

88.

Test for carbon dioxide gas:

a)

Relights glowing splint

b)

Damp blue litmus paper goes white

c)

Lit splint produces squeaky pop

d)

Limewater goes cloudy

89.
What physical property allows Distillation to separate different molecules?
a)
a) Melting point
b)
b) Boiling point
c)
c) Diffusion rate
d)
d) Condensation rate
90.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
91.
Which formula represents a saturated hydrocarbon?
a)
A
b)
B
c)
C
d)
D
92.
What chemical is this? (C5H10)
a)
Pentene
b)
Pentane
c)
Hexane
d)
Heptene
93.
Cracking.....
a)
Breaks larger hydrocarbons into smaller hydrocarbons
b)
Separates hydrocarbons based on their length
c)
Detects alkenes
94.

Conditions for cracking is...

a)

High temperature

b)

Low temperature

c)

Catalyst and steam

d)

catalyst or steam

95.

Test for alkenes is

a)

add acid

b)

add water

c)

Add bromine water

d)

burn it

96.

Bromine water with an alkene will

a)

have no change

b)

go clear

c)

go orange to clear

d)

go orange to colourless

e)

fizz

97.

Bromine water with an alkane will....

a)

have no change/stay orange

b)

go clear

c)

go orange to clear

d)

go orange to colourless

e)

fizz

98.
The process of separating the different length hydrocarbons from crude oil is known as...
a)
Distillation
b)
Cracking
c)
Fractional Distillation
d)
Filtering
99.
Name this alkane
a)
Methane
b)
Ethane
c)
Propane
d)
Butane
100.
How many carbon atoms are in butane
a)
1
b)
2
c)
3
d)
4
101.
The longer the hydrocarbon, the _______ the boiling point
a)
Lower
b)
Higher
102.
The longer the hydrocarbon, the ______ the volatility
a)
Lower
b)
Higher
103.
The longer the hydrocarbon, the _________ the viscosity?
a)
Lower
b)
Higher
104.
The longer the hydrocarbon, the ________ the flammability?
a)
Lower
b)
Higher
105.
In fractional distillation, longer length hydrocarbons are found where in the distillation column?
a)
Top
b)
Bottom
106.
What are the two products of complete combustion?
a)
Water and carbon monoxide
b)
Water and carbon dioxide
c)
Hydrogen and water
d)
Carbon dioxide
107.
What gas is given off what a hydrocarbon has incomplete combustion?
a)
Carbon Dioxide
b)
Hydrogen
c)
Carbon Monoxide
d)
Oxygen
108.

What colour does bromine water turn in the presence of an alkene

a)

Orange

b)

Blue

c)

Colourless

109.
What is a saturated hydrocarbon?
a)
Has only single covalent bonds
b)
Has a mixture of single and double covalent bonds
c)
Has only double covalent bonds
d)
Has covalent and ionic bonds
110.
What are the products of combustion if there is plenty of oxygen available?
a)
carbon monoxide and hydrogen
b)
carbon dioxide and water
c)
carbon dioxide and hydrogen
d)
carbon monoxide and water
111.
What is cracking?
a)
Shorter chain fractions are built up into longer chain fractions.
b)
The petrol fraction is removed from the rest of the crude oil.
c)
The crude oil is separated into fractions by heating.
d)
Longer chain fractions are broken into shorter chain fractions.
112.
What are the products of cracking?
a)
Short chain hydrocarbons and alkenes
b)
Long chain hydrocarbons and alkenes
c)
Short chain hydrocarbons only
d)
Alkenes only
113.
The straight chain molecule C13H28 occurs in the kerosene fraction.
When this molecule is cracked, a C2H4 molecule, a C4H8 molecule and an unbranched alkane molecule are obtained.
What is the unbranched alkane molecule
a)
C7H14 
b)
C5H10 
c)
C6H14 
d)
C7H16
114.

Why can't you use hydrochloric or sulfuric acids to test for anions?

a)

they don't react

b)

you need to test for both chloride and sulfate ions so can't use an acid that contains these

c)

they yield different products

d)

the pH is too low

115.

What is a positive test for a carbonate ion?

a)

limewater turns cloudy

b)

limewater goes clear

c)

add barium sulfate

d)

add silver nitrate

116.

Silver nitrate and nitric acid are used to test for....

a)

metals

b)

noble gases

c)

halogens

d)

metal oxides

117.

A yellow precipitate formed when an unknown solution is added to silver nitrate and nitric acid indicates the presence of which ion?

a)

iodide

b)

chloride

c)

bromide

d)

fluoride

118.

A cream precipitate formed when an unknown solution is added to silver nitrate and nitric acid indicates the presence of which ion?

a)

chloride

b)

iodide

c)

bromide

d)

fluoride

119.

A white precipitate formed when an unknown solution is added to silver nitrate and nitric acid indicates the presence of which ion?

a)

bromide

b)

iodide

c)

fluoride

d)

chloride

120.

Adding barium nitrate to an unknown solution will indicate the presence of....

a)

sulfate

b)

phosphate

c)

carbonate

d)

sulfate & phosphate

121.

A gas produced when nitric acid is added to an unknown solution indicates the presence of....

a)

suulfate

b)

carbonate

c)

phosphate

d)

nitrate

122.

A substance that is soluble when both silver nitrate and nitric acid are added is...

a)

sulfate

b)

phosphate

c)

a halogen

d)

hydroxide

123.

If a precipitate remains when nitric acid is added to a white precipitate, it indicates the presence of...

a)

sulfate

b)

phosphate

c)

nitrate

d)

carbonate

124.

Which of the following will form an anion?

a)

Titanium

b)

Iron

c)

Calcium

d)

Sulfur

125.

Which of the following elements will form a cation?

a)

Arsenic

b)

Copper

c)

Bromine

d)

Fluorine

126.

See above

a)

A

b)

B

c)

C

d)

D

127.

See above

a)

A

b)

B

c)

C

d)

D

128.

See above

a)

A

b)

B

c)

C

d)

D

129.

Why can't you use a flame test to distinguish between silver and lead?

a)

silver is colourless

b)

lead is toxic

c)

they are the same colour

d)

both 1 & 2 are correct

130.

A light blue precipitate formed when sodium hydroxide is added to an unknown solution indicates the presence of.....

a)

barium

b)

calcium

c)

copper

d)

iron(II)

131.

A green precipitate formed when sodium hydroxide is added to an unknown solution indicates the presence of.....

a)

iron(III)

b)

calcium

c)

copper

d)

iron(II)

132.

Which metal produces a brick red flame?

a)

barium

b)

calcium

c)

silver

d)

lead

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