Question 1

The group containing a metal, a non-metal and a mixture is …

Accepted Answer

granite, gold and sulfur.

Answer

concrete, granite and oxygen

Answer

carbon, sulfur and crude oil

Answer

carbon dioxide, aluminium and oxygen

Question 2

In which of the following changes do the particles move closer together

Accepted Answer

Condensation of steam

Answer

Melting of a block of chocolate

Answer

Evaporation of alcohol

Answer

Dissolving sugar in a cup of coffee

Question 3

At a given temperature, gases are more easily compressed than liquids because the particles in gases …

Accepted Answer

are more widely spaced than those in a liquid.

Answer

have stronger forces between them than the particles in liquids

Answer

are moving faster than the particles in liquids

Answer

are larger than the particles in liquids

Question 4

Which of the following is not an assumption of the kinetic theory?

Accepted Answer

Gas molecules are composed of at least two atoms

Answer

In gases the particles are widely spaced

Answer

The molecules of a gas move in rapid, random, straight-line motion

Answer

Gases consist of tiny particles called molecules

Question 5

A sterling silver bracelet is composed of silver and copper in the mass ratio 93:7. Sterling silver is an example of …

Accepted Answer

a homogeneous mixture

Answer

a heterogeneous mixture

Answer

a compound

Answer

an element

Question 6

Which of the following statements is true?

Accepted Answer

Iron(II) sulfide is more dense than sulfur

Answer

All compounds of iron are magnetic

Answer

Iron is grey and sulfur is yellow, so iron(II) sulfide is a dull yellow colour

Answer

Iron(II) sulfide has a higher melting point than iron

Question 7

The group containing only pure substances is …

Accepted Answer

water, glucose and silver

Answer

oxygen, iron and granite

Answer

carbon monoxide, wine and magnesium

Answer

air, copper and sodium chloride

Question 8

Which of the following would be present in the atmosphere above a city in the largest percentage by volume?

Accepted Answer

Oxygen

Answer

Carbon dioxide

Answer

Argon

Answer

Water

Question 9

Which pure substance would be present in a higher concentration in the lithosphere than the hydrosphere?

Accepted Answer

Carbon

Answer

Sodium chloride

Answer

Oxygen

Answer

Water

Question 10

The part of the Earth consisting of molten iron and nickel is the …

Accepted Answer

outer core

Answer

lithosphere

Answer

mantle

Answer

inner core

Question 11

The physical property that the process of crystallization relies on is …

Accepted Answer

solubility

Answer

density

Answer

boiling point

Answer

particle size

Question 12

To separate two miscible liquids, X (boiling point 75°C) and Y (boiling point 85°C), the best technique to use would be …

Accepted Answer

fractional distillation

Answer

centrifuging

Answer

distillation

Answer

separating funne

Question 13

The apparatus in the picture is used to separate …

Accepted Answer

immiscible liquid

Answer

a gas mixture

Answer

a solid from a liquid

Answer

miscible liquids

Question 14

Which statement is true of gas chromatography?

Accepted Answer

The components move through the column at different rates

Answer

The components move up strips of special filter paper

Answer

The column is packed with alumina

Answer

A suitable liquid solvent is used

Question 15

The best way to separate a mixture of iron, sand and water would be …

Accepted Answer

magnetic separation followed by filtration.

Answer

magnetic separation followed by chromatography

Answer

separating funnel followed by centrifuging

Answer

filtration followed by crystallisation

Question 16

An 8.00 g sample of hydrated iron(III) oxide, $Fe_2O_3.H_2O$, was heated in an oven to constant mass. The final sample mass was 7.20 g. The percentage of water (by mass) in the sample was …

Accepted Answer

10%

Answer

0.9%

Answer

0.1%

Answer

90%

Question 17

The two most abundant elements in the universe are …

Accepted Answer

hydrogen and helium

Answer

iron and oxygen.

Answer

hydrogen and oxygen.

Answer

carbon and hydrogen.

Question 18

The most abundant element in the lithosphere is …

Accepted Answer

oxygen.

Answer

aluminium.

Answer

silicon.

Answer

iron.

Question 19

Which of these is not a mineral?

Accepted Answer

Iron

Answer

Quartz

Answer

Sulfur

Answer

Gold

Question 20

An element that normally exists as a diatomic molecule is …

Accepted Answer

hydrogen.

Answer

phosphorus.

Answer

sulfur.

Answer

argon.

Question 21

Molecules of white phosphorus have the chemical formula …

Accepted Answer

$P_4$

Answer

P

Answer

$P_2$

Answer

$P_3$

Question 22

An ammonia molecule consists of …

Accepted Answer

one nitrogen atom and three hydrogen atoms

Answer

two nitrogen atoms and two hydrogen atoms.

Answer

three nitrogen atoms and one hydrogen atom.

Answer

one nitrogen atom and two hydrogen atoms.

Question 23

Silicon is normally found as …

Accepted Answer

a network structure

Answer

a diatomic molecule

Answer

a liquid

Answer

a native metal

Question 24

Two molecules that contain the same number of atoms are …

Accepted Answer

hydrogen peroxide and ammonia

Answer

hydrogen chloride and carbon dioxide

Answer

water and methane

Answer

ammonia and water

Question 25

Which of these elements is the least reactive?

Accepted Answer

Krypton

Answer

Chlorine

Answer

Sodium

Answer

Aluminium

Question 26

Which of the following metals is more reactive than the others?

Accepted Answer

Sodium

Answer

Copper

Answer

Calcium

Answer

Aluminium

Question 27

Which metal is most likely to be found uncombined in nature?

Accepted Answer

Silver

Answer

Iron

Answer

Sodium

Answer

Aluminium

Question 28

The group VII element found in common salt is …

Accepted Answer

chlorine

Answer

bromine

Answer

fluorine

Answer

iodine

Question 29

Which of the following statements concerning the source of metals is correct?

Accepted Answer

Some metals are found pure, while others are found as minerals

Answer

Most metals are extracted from ores using electricity

Answer

Some traces of all metals can be found pure in the Earth's crust

Answer

All metals must be extracted from ores

Question 30

Which list below contains only properties of metals?

Accepted Answer

Electrical conductivity, lustre and malleability

Answer

High melting point, thermal conductivity and brittleness

Answer

Non-conductive, hard and malleable

Answer

Electrical conductivity, low boiling point and low density

Question 31

All metals do not behave the same. While lead has a high density, aluminium has a very low density. Which of the following statements is true? All metals …

Accepted Answer

conduct electricity

Answer

are magnetic

Answer

are silver in colour.

Answer

exist as solids at room temperatures.

Question 32

Which non-metal is incorrectly matched to its use?

Accepted Answer

Phosphorus – used in vulcanising rubber

Answer

Carbon – used in lead pencils

Answer

Chlorine – used in water treatment

Answer

Helium – used in airships

Question 33

Which of the following is not a property of most non-metals?

Accepted Answer

Good conductor of heat

Answer

Poor conductor of electricity

Answer

Brittle

Answer

Not lustrous

Question 34

Phosphorus is used in match heads because it has high …

Accepted Answer

reactivity.

Answer

density

Answer

melting point

Answer

conductivity

Question 35

The most useful physical property in separating metals from semi-metals is …

Accepted Answer

conductivity

Answer

appearance

Answer

melting point

Answer

boiling point

Question 36

Most of the elements on the periodic table are …

Accepted Answer

metals

Answer

man-made

Answer

non-metals

Answer

semi-metals

Question 37

John Dalton presented his atomic theory in the early 1800s. Which of the following is not part of that theory?

Accepted Answer

Atoms are composed of positively and negatively charged particles

Answer

Atoms are composed of two or more elements

Answer

Atoms are neither created nor destroyed during chemical reactions

Answer

Atoms of each element have a unique mass

Question 38

The following statements concern the structure of the atom. Which is the correct statement?

Accepted Answer

The number of neutrons might not equal the number of protons

Answer

The nucleus is always neutral

Answer

Protons, neutrons and electrons are almost identical in size

Answer

Electrons are held stationary in fixed positions around the nucleus

Question 39

The atom with 3 electrons, 4 neutrons and 3 protons is …

Accepted Answer

lithium.

Answer

nitrogen

Answer

boron

Answer

beryllium

Question 40

Isotopes are atoms that have …

Accepted Answer

the same atomic number but different mass numbers.

Answer

an equal number of protons and neutrons

Answer

complete outer shells

Answer

the same number of neutrons but different atomic numbers

Question 41

The element with electron configuration 2,8,3 is …

Accepted Answer

aluminium

Answer

sodium

Answer

magnesium

Answer

silicon

Question 42

The third energy level (shell) in an atom can hold a maximum of …

Accepted Answer

18

Answer

10

Answer

8

Answer

2

Question 43

Which element has a different number of valence electrons to its group number?

Accepted Answer

Helium

Answer

Hydrogen

Answer

Boron

Answer

Oxygen

Question 44

The iron(III) ion has the chemical formula …

Accepted Answer

$Fe^{3+}$.

Answer

$Fe^{2+}$

Answer

$Fe_3$

Answer

$3Fe^+$

Question 45

If element X is found in group II of the periodic table, the likely charge on its stable ion is …

Accepted Answer

+2

Answer

−2

Answer

+1

Answer

−1

Question 46

Anions are …

Accepted Answer

ions with a negative charge.

Answer

ions with a positive charge

Answer

ions that contain oxygen

Answer

polyatomic ions

Question 47

Only one of the following molecules exists. Which one is it?

Accepted Answer

$PH_3$

Answer

$CCl_3$

Answer

HS

Answer

$HF_2$

Question 48

Which of the following molecules has the greatest number of non-bonding outer-shell electron pairs?

Accepted Answer

$F_2$

Answer

$H_2S$

Answer

$NH_3$

Answer

$N_2$

Question 49

Which group contains ionic compounds only?

Accepted Answer

NaCl, $BaCl_2$, CuO

Answer

$CO_2$, $CH_4$, $Fe_2O_3$

Answer

$Na_2SO_4$, $SiO_2$, CsCl

Answer

$Al_2O_3$, $Fe_2O_3$, CO

Question 50

The number of electrons involved in single, double and triple bonds, respectively, are …

Accepted Answer

2, 4, 6

Answer

1, 3, 6

Answer

2, 3, 4

Answer

1, 2, 3

Question 51

The correct systematic name for $N_2O_4$ is …

Accepted Answer

dinitrogen tetraoxide

Answer

nitrogen oxide

Answer

nitrogen tetraoxide

Answer

tetranitrogen dioxide

Question 52

SiO2 is the chemical formula of quartz. It is true to say that …

Accepted Answer

this is an empirical formula

Answer

ionic bonding is present in quartz

Answer

$SiO_2$ is a molecular compound

Answer

the ratio of silicon atoms to oxygen atoms in the crystal is 2 : 1

Question 53

Which of the following is an example of chemical change?

Accepted Answer

Rusting iron

Answer

Dissolving sugar in tea

Answer

Melting ice

Answer

Chopping wood

Question 54

Which process will take the most energy, assuming that you start the same number of particles of each react

Accepted Answer

Decomposing NaOH into its elements

Answer

Electrolysis of water

Answer

Boiling water

Answer

Dissolving NaOH in water

Question 55

When water boils …

Accepted Answer

intermolecular bonds are broken but intramolecular bonds stay intact.

Answer

both intramolecular bonds and intermolecular bonds stay intact.

Answer

intramolecular bonds are broken but intermolecular bonds stay intact.

Answer

both intramolecular bonds and intermolecular bonds are broken.

Question 56

Physical changes …

Accepted Answer

include changes of state.

Answer

require energy.

Answer

involve the formation of a new substance.

Answer

take little energy.

Question 57

The value of x in the following equation is …
$3NaHCO_3$ + $H_3C_6H_5O_7$ --->  x $CO_2$ + $yH_2O$ + $Na_3C_6H_5O_7$

Accepted Answer

3

Answer

2

Answer

1

Answer

4

Question 58

The following equation represents the reaction of copper with concentrated nitric acid:
vCu(s) + $wHNO_3$(aq) --> $xCu(NO_3)_2$(aq) + $yNO_2$(g) + $zH_2O$(l)

The set of coefficients, in the order v to z, which will balance this equation is …

Accepted Answer

1,4,1,2,2

Answer

1,1,1,1,1

Answer

1,3,1,1,1

Answer

1,4,1,2,1

Question 59

Iron can react with water to produce iron oxide and hydrogen gas. The unbalanced equation is:
wFe(s) + $xH_2O$(l) --> $yFe_3O_4$(s) + $zH_2$(g)

The set of coefficients, in the order w to z, which will balance this equation is …

Accepted Answer

3,4,1,4

Answer

6,8,2,4

Answer

3,1,1,1

Answer

1,12,3,12

Question 60

When heated, calcium carbonate produces calcium oxide and carbon dioxide. This is an example of a/n …

Accepted Answer

decomposition reaction

Answer

synthesis reaction

Answer

neutralisation reaction

Answer

precipitation reaction

Question 61

When mercury(II) oxide decomposes upon heating …

Accepted Answer

$Hg^{2+}$ ions are converted to liquid mercury.

Answer

covalent bonds are broken

Answer

$O_2$ is converted to $O^{2-}$ ions

Answer

a physical change occurs

Question 62

A product of the thermal decomposition of $NaHCO_3$ is …

Accepted Answer

carbon dioxide

Answer

sodium

Answer

sodium hydroxide

Answer

carbon monoxide

Question 63

Silver salts are used in photography because they are …

Accepted Answer

light sensitive

Answer

non-toxic

Answer

very cheap

Answer

naturally occurring

Question 64

Which bond would be hardest to break?

Accepted Answer

An O–H bond

Answer

A Cl–Cl bond

Answer

A C–O bond

Answer

A H–H bond

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