Question 1

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 2

The names of some periods (ages) of human history are taken from the metals whose use was very prominent during them. Which of the following lists these ages in chronological order?

Accepted Answer

Copper, bronze, iron

Answer

Bronze, copper, iron

Answer

Iron, bronze, copper

Answer

Copper, iron, bronze

Question 3

Bronze is an alloy of …

Accepted Answer

copper and tin.

Answer

copper and carbon.

Answer

copper and iron.

Answer

copper and zinc.

Question 4

Steel is an alloy of iron and …

Accepted Answer

carbon.

Answer

silicon.

Answer

zinc.

Answer

aluminium.

Question 5

In the middle of the 19th century, aluminium was more valuable than gold because …

Accepted Answer

aluminium was more difficult to obtain in pure form than gold.

Answer

aluminium was less abundant in the Earth's crust than gold.

Answer

aluminium was less reactive than gold.

Answer

the colour of aluminium was more favoured than the colour of gold.

Question 6

The uses of some metals are related to their lack of chemical reactivity. For which of the following metals is this not the case?

Accepted Answer

Magnesium

Answer

Platinum

Answer

Titanium

Answer

Gold

Question 7

Of the following metals, the most suitable for use as a television antenna would be …

Accepted Answer

aluminium.

Answer

gold.

Answer

lead.

Answer

iron.

Question 8

The best metal to use for the electrodes of a heart pacemaker would be …

Accepted Answer

platinum.

Answer

iron.

Answer

lead.

Answer

sodium.

Question 9

Which of the following is not a property of titanium?

Accepted Answer

It has a low melting point.

Answer

It has great strength.

Answer

It is biocompatible.

Answer

It has a low density.

Question 10

An alloy containing two metals …

Accepted Answer

might have superior properties to those of either of the two metals.

Answer

is made from two metals with similar atom sizes.

Answer

will have properties that are an average of the properties of the two metals.

Answer

is made from a reaction between equal proportions of the two metals.

Question 11

Two useful properties that are often increased by alloying are …

Accepted Answer

resistance to corrosion and hardness.

Answer

ductility and lustre.

Answer

electrical conductivity and brittleness.

Answer

hardness and malleability.

Question 12

The structure of a material is shown in the diagram below. Considering the size of the atoms, if most of the material is aluminium, which of the following is the impurity most likely to be?

Accepted Answer

Copper

Answer

Silicon

Answer

Carbon

Answer

Gold

Question 13

The alloy which is a mixture of copper and zinc is …

Accepted Answer

brass.

Answer

pewter.

Answer

solder.

Answer

bronze.

Question 14

Sterling silver contains …

Accepted Answer

silver and copper.

Answer

silver and nickel.

Answer

silver and tin.

Answer

silver and gold.

Question 15

The heat treatment technique known as quenching (heating then cooling quickly) would most likely be used to produce a metal that is …

Accepted Answer

harder and more brittle than the original metal.

Answer

harder and more malleable than the original metal

Answer

softer and more brittle than the original metal

Answer

softer and more malleable than the original metal

Question 16

Heating a metal pin and then allowing it to cool slowly will produce a pin with …

Accepted Answer

large crystals, making the pin more malleable.

Answer

small crystals, making the pin more malleable

Answer

small crystals, making the pin less malleable

Answer

large crystals, making the pin less malleable

Question 17

Which of the following could not be described as an alloy?

Accepted Answer

A combination of copper and sulfur in the mass ratio 2:1

Answer

A combination of iron and carbon in the mass ratio 19:1

Answer

A combination of copper and tin in the mass ratio 9:1

Answer

A combination of copper and zinc in the mass ratio 7:3

Question 18

Which of the following minerals contains copper?

Accepted Answer

Malachite

Answer

Bauxite

Answer

Magnetite

Answer

Chromite

Question 19

Aluminium can be extracted from …

Accepted Answer

bauxite.

Answer

rutile

Answer

sphalerite

Answer

galena

Question 20

The extraction of copper does not involve …

Accepted Answer

magnetic separation.

Answer

froth flotation

Answer

electrorefining

Answer

smelting

Question 21

To be used for wiring, copper needs to have a purity closest to …

Accepted Answer

100%

Answer

95%

Answer

85%

Answer

90%

Question 22

The most abundant metal in the Earth's crust is …

Accepted Answer

aluminium

Answer

iron

Answer

lead

Answer

copper

Question 23

Compared to the extraction of aluminium from bauxite, aluminium recycling …

Accepted Answer

takes less energy because no chemical change occurs

Answer

takes more energy because used aluminium is hard to purify

Answer

is much more costly

Answer

takes the same amount of energy

Question 24

The reaction that occurs at the anode of the Hall-Heroult cell is …

Accepted Answer

C(s) + $2O^{2-}$(l) -->  $CO_2$(g) + 4e−

Answer

$2Al(OH)_3$(s) --> $Al_2O_3$(s) + $3H_2O$(l)

Answer

$O^{2-}$(l) --> O (g) + 2e−

Answer

$Al^{3+}$(l) + $3e^-$   -->  Al(l)

Question 25

Which metal is so reactive that it catches fire when exposed to air?

Accepted Answer

Rubidium

Answer

Magnesium

Answer

Iron

Answer

Aluminium

Question 26

Which metal will react slowly if heated in air?

Accepted Answer

Copper

Answer

Silver

Answer

Platinum

Answer

Sodium

Question 27

Which metal will burn in oxygen if finely divided?

Accepted Answer

Iron

Answer

Mercury

Answer

Gold

Answer

Tin

Question 28

When testing for hydrogen the gas should …

Accepted Answer

'pop' with a naked flame.

Answer

relight a glowing splint

Answer

smell like rotten egg

Answer

cause lime water to turn milky

Question 29

A characteristic of oxidation–reduction reactions is that …

Accepted Answer

electrons move from one reactant to another.

Answer

one of the reactants will be an ionic compound

Answer

a gas is released

Answer

metal atoms will always be formed

Question 30

The products of the reaction between sodium metal and water are …

Accepted Answer

$H_2$(g) and NaOH(aq)

Answer

$O_2$(g) and NaH(aq)

Answer

$O_2$(g) + $NaOH_2$(aq)

Answer

$Na_2O$(s) and $H_2$(g)

Question 31

The products of the reaction between zinc metal and steam are …

Accepted Answer

ZnO(s) and $H_2$(g)

Answer

$Zn(OH)_2$(aq) and $H_2$(g)

Answer

$ZnH_2$(s) and $O_2$(g)

Answer

ZnO(s) and $O_2$(g)

Question 32

When a metal reacts with nitric acid …

Accepted Answer

electrons move from the metal to the hydrogen ions.

Answer

electrons move from the hydrogen ions to the nitrate ions

Answer

no electrons are exchanged

Answer

electrons move from the nitrate ions to the metal

Question 33

A metal that will not react with cold, dilute sulfuric acid is …

Accepted Answer

lead

Answer

nickel

Answer

aluminium

Answer

zinc

Question 34

The salt that forms when sulfuric acid reacts with magnesium metal is …

Accepted Answer

$MgSO_4$

Answer

$MgS_2O_3$

Answer

$MgSO_3$

Answer

MgS

Question 35

The relationship between first ionisation energy and the reactivity of a metal is …

Accepted Answer

the lower the first ionisation energy, the higher the reactivity of the metal.

Answer

the higher the first ionisation energy, the higher the reactivity of the metal.

Answer

the reactivity of a metal is not related to its first ionisation energy.

Answer

the lower the first ionisation energy, the lower the reactivity of the metal.

Question 36

Which of the following equations is a balanced reduction half-equation?

Accepted Answer

$Cl_2$(g) + 2e− --> $2Cl^-$(aq)

Answer

Na (s) --> $Na^+$ (aq) + e−

Answer

$F_2$ (g) --> $2F^-$ + 2e−

Answer

$Br_2$(g) + e− --> $Br^-$(aq)

Question 37

During the rusting of an iron nail, which of the following half reactions could represent the oxidation occurring?

Accepted Answer

$Fe^{2+}$(s) -->  Fe(aq) + 2e−

Answer

$2Fe(OH)_3$(s) --> $Fe_2O_3.xH_2O$ (s) + (3 − x)$H_2O$(l) (x < 3)

Answer

$Fe^{2+}$ (aq) + $2OH^-$(aq) --> $Fe(OH)_2$(s)

Answer

$O_2$ (g) + $2H_2O$ (l) + 2e− --> $4OH^-$(aq)

Question 38

The reduction reaction that occurs when magnesium burns in oxygen is …

Accepted Answer

$O_2$(g) + 4e− --> $2O^{2-}$(s)

Answer

$O_2$ (g) + $2H_2O$ (l) + 4e− --> $4OH^-$(aq)

Answer

2Mg (s) + $O_2$ (g) --> 2MgO (s)

Answer

Mg (s) --> $Mg^{2+}$(s) + 2e−

Question 39

Which of the following is not a use of gold?

Accepted Answer

Protecting steel ships from corrosion

Answer

In computer circuits

Answer

In the space industry

Answer

Jewellery making

Question 40

Steel cans are coated in tin because …

Accepted Answer

tin forms an oxide coat that protects the iron from corrosion

Answer

tin will not react with oxygen but iron will.

Answer

tin is inexpensive compared to iron.

Answer

tin enhances the flavour of the food.

Question 41

Which of the following is the most significant reason for the lack of a periodic table until nearly 1870?

Accepted Answer

Not enough elements were known

Answer

The chemical formulas of many compounds were incorrect

Answer

It was not known that the atom contained smaller particles like protons, neutrons and electrons

Answer

The mass spectrometer was yet to be invented to provide accurate relative atomic masses

Question 42

Johann Dobereiner listed several groups of similar elements that he labelled 'triads'. Which of these groups of 3 elements might have been one of his triads?

Accepted Answer

Chlorine, bromine and iodine

Answer

Hydrogen, helium and lithium

Answer

Helium, neon and argon

Answer

Sodium, magnesium and aluminium

Question 43

In 1869 Mendeleev published his periodic table. One of Mendeleev's significant achievements was to …

Accepted Answer

leave blanks in his table where no known element seemed to fit.

Answer

predict the existence of the Group 18 elements.

Answer

arrange the elements in order of atomic number.

Answer

arrange the elements vertically in order of outer-shell electron configuration.

Question 44

William Ramsay and his research team discovered the Group 18 elements in the period between 1893–1898. These elements were isolated …

Accepted Answer

from careful experimentation with air, and emission spectra were examined to verify each new find.

Answer

from careful experimentation with air, and mass spectrometry was used to verify each new find.

Answer

from unusual mineral ores, and emission spectra were examined to verify each new find.

Answer

using the recently discovered radiation.

Question 45

The reason that elements within a group have similar chemical properties is that …

Accepted Answer

they have a similar configuration of outer-shell electrons.

Answer

the atoms have a similar radius.

Answer

the atoms have the same number of electron shells.

Answer

each element in the group has one more proton than the previous element.

Question 46

Compared to an atom of oxygen, an atom of selenium will be …

Accepted Answer

larger, less electronegative, and have a lower first ionisation energy.

Answer

less electronegative, and have a higher first ionisation energy.

Answer

more reactive and more electronegative.

Answer

smaller, less electronegative and more reactive.

Question 47

Aluminium has an atomic number of 13. The most likely ion that it will form is …

Accepted Answer

$Al^{3+}$

Answer

$Al^+$

Answer

$Al^{3-}$

Answer

$Al^-$

Question 48

The element that is in Group II and Period 4 of the periodic table is …

Accepted Answer

calcium

Answer

carbon.

Answer

silicon.

Answer

strontium.

Question 49

The distinction between metal and non-metal elements is most closely related to …

Accepted Answer

the number of electrons in the outer shell.

Answer

the atomic mass of the elements.

Answer

the number of electrons in an atom of the element.

Answer

the atomic number of the element.

Question 50

Element 63 is …

Accepted Answer

a lanthanide.

Answer

an alkali metal.

Answer

group IV.

Answer

an actinide.

Question 51

Which is not a property of a transition metal?

Accepted Answer

They are all highly reactive

Answer

They are good conductors of electricity

Answer

Most are hard

Answer

They form coloured compounds

Question 52

An atom's group number is equal to …

Accepted Answer

the number of valence electrons it has.

Answer

the number of occupied electron shells it has.

Answer

the positive charge of its nucleus.

Answer

the charge on its common ion.

Question 53

An atom's period number is equal to …

Accepted Answer

the number of occupied electron shells.

Answer

the charge on its common ion.

Answer

its nuclear charge.

Answer

the number of valence electrons.

Question 54

The graph shown could represent the trend in which of the following properties?

Accepted Answer

Atomic radius

Answer

Electronegativity

Answer

Ionisation energy

Answer

Number of occupied electron shells

Question 55

This graph shows the trend in first ionisation energy for the first 20 elements. The elements forming the peaks of this graph belong to which group?

Accepted Answer

Noble gases

Answer

Group VII

Answer

Transition metals

Answer

Group I

Question 56

What shows an increasing trend across a period of the periodic table?

Accepted Answer

Electronegativity

Answer

Metallic character

Answer

Atomic radius

Answer

Reactivity

Question 57

Lithium has two isotopes. Their relative isotopic masses are 6.02 and 7.02. The relative atomic mass of lithium is 6.94. Using this data, the calculated relative abundance the heavier isotope is …

Accepted Answer

92%.

Answer

50%

Answer

8%

Answer

64%

Question 58

Which of the following is the best definition of a mole?

Accepted Answer

A mole of any substance contains the same number of particles as 12 g of $^{12}C$

Answer

A mole of any substance contains the same number of particles as 12 g of naturally occurring carbon

Answer

A mole is 6.02 × $10^{23}$ atoms of any substance

Answer

A mole is 12 g of any element

Question 59

The molar mass of ethane, $C_2H_6$, is …

Accepted Answer

30 g/mol

Answer

30 amu

Answer

18 g/mol

Answer

13 amu

Question 60

How many mole of atoms are present in 7 mole of sulfuric acid, $H_2SO_4$?

Accepted Answer

49

Answer

7 × 6 × $10^{23}$

Answer

7

Answer

21

Question 61

A beaker contains 6.02 × $10^{24}$ molecules of water. How many mole of atoms is this?

Accepted Answer

30

Answer

1

Answer

10

Answer

30 × 6.02 × $10^{23}$

Question 62

The indigo dye used to colour blue jeans has the formula $C_{16}H_{10}N_2O_2$. How many mole of indigo are there in 50.0 g of the dye?

Accepted Answer

0.191 mol

Answer

262 mol

Answer

131 mol

Question 63

The number of atoms in 128 g of sulfur dioxide is …

Accepted Answer

6 x 6.02 × $10^{23}$

Answer

2

Answer

6

Answer

2 × 6.02 × $10^{23}$

Question 64

Which of the following contains the greatest number of mole of sulfur atoms?

Accepted Answer

198 g of S

Answer

3.0 × $10^{24}$ molecules of $H_2S$

Answer

47.8 g of CuS

Answer

1.8 × $10^{24}$ atoms of S

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