Question 1

A student prepares a pure sample of sodium sulfate from dilute sulfuric acid and aqueous sodium hydroxide.

Which apparatus does the student use?

Accepted Answer

burette, pipette and an evaporating dish

Answer

measuring cylinders, a filter funnel and filter papers

Answer

pipette, balance and an evaporating dish

Answer

burette, pipette, a filter funnel and filter papers

Question 2

A flask contains solution X.

Solution X is a mixture of aqueous sodium hydroxide and aqueous sodium carbonate.

Which apparatus could be used on its own to determine the number of moles of sodium carbonate present in solution X?

Accepted Answer

1 and 2

Answer

2 and 3

Answer

1 only

Answer

3 only

Question 3

Solution Y contains a mixture of flavourings. Solution Y and four other solutions, A, B, C and D, are analysed by chromatography.

The result is shown in chromatogram 1. The chromatogram is then sprayed with a locating agent. This is shown as chromatogram 2.

Which solution contains the same mixture of flavourings as solution Y?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 4

Two tests on a white powder are shown.

1 Aqueous sodium hydroxide is added and the mixture is warmed. The gas produced turns damp red litmus paper blue.

2 The powder is dissolved in water. Dilute nitric acid followed by aqueous barium nitrate are added. A thick white precipitate is formed.

Which ions are present in the powder?

Accepted Answer

ammonium ions and sulfate ions

Answer

sodium ions and nitrate ions

Answer

nitrate ions and sulfate ions

Answer

ammonium ions and chloride ions

Question 5

Sulfur dioxide, SO₂, is dissolved in a little water to make a solution. The pH of the solution is tested.

Sulfur dioxide is then bubbled in to acidified potassium manganate(VII).

Which row identifies the pH of the solution and the observation with acidified potassium manganate(VII)?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 6

What is observed if aqueous potassium iodide is added to aqueous silver nitrate?

Accepted Answer

Two colourless solutions react to give a yellow precipitate and a colourless solution.

Answer

One colourless solution and one yellow solution react to give a yellow precipitate and a colourless solution.

Answer

One colourless solution and one yellow solution react to give a white precipitate and a colourless solution.

Answer

Two colourless solutions react to give a white precipitate and a colourless solution.

Question 7

The graph shows the temperature of a solid as it is heated.

Which change is labelled correctly?

Accepted Answer

freezing

Answer

melting

Answer

vaporisation

Answer

condensation

Question 8

Which gas diffuses most rapidly?

Accepted Answer

propene molecules at 75 ^oC

Answer

propene molecules at 25 ^oC

Answer

carbon dioxide molecules at 25 ^oC

Answer

carbon dioxide molecules at 75 ^oC

Question 9

Which ion contains the same number of electrons as $_{26}^{56}\mathrm{Fe}^{3+}$ ?

Accepted Answer

$_{25}^{56}\mathrm{Mn}^{2+}$

Answer

$_{25}^{56}\mathrm{Mn}^{2+}$

Answer

$_{25}^{56}\mathrm{Mn}^{2+}$

Answer

$_{25}^{56}\mathrm{Mn}^{2+}$

Question 10

Which statement about diamond and silicon dioxide is correct?

Accepted Answer

They are electrical insulators because there are no mobile electrons.

Answer

They are electrical insulators because the atoms are unable to move.

Answer

They are hard because of the strong electrostatic forces between the layers of atoms.

Answer

Each atom is bonded to three other atoms in the structures.

Question 11

Which property is shown by all ionically bonded metal compounds?

Accepted Answer

The metal can be extracted by electrolysis of the molten compound.

Answer

They are soluble in water.

Answer

The metal is the anion in the compound.

Answer

They conduct electricity in the solid state.

Question 12

Which statement about covalently bonded substances is correct?

Accepted Answer

More electrons are used to form the bonds in nitrogen, N₂, than are used to form the bonds in oxygen, O₂.

Answer

The compound CS₂ does not conduct electricity as a gas but conducts as a liquid.

Answer

SiO₂ is a gas at room temperature.

Answer

Hexane, C₆H₁₄, is a liquid at room temperature whilst ethane is a gas because hexane contains stronger covalent bonds.

Question 13

In the liquid state, which substance conducts electricity using mobile electrons?

Accepted Answer

cobalt

Answer

cobalt(II) chloride

Answer

ammonia

Answer

ammonium chloride

Question 14

What contains the smallest number of particles?

Accepted Answer

8 g of oxygen molecules

Answer

2 g of hydrogen molecules

Answer

4 g of helium atoms

Answer

22 g of carbon dioxide molecules

Question 15

A chemical in a paint has the following composition.

What is its empirical formula?

Accepted Answer

Co₃P₂O₈

Answer

Co₅P₇O₂

Answer

Co2P4O

Answer

Co3PO2

Question 16

100 cm³ of methane is burned in 150 cm³ of oxygen.

When cooled to room temperature, what could be the resulting mixture of gases?

Accepted Answer

CH₄, CO, CO₂

Answer

CO₂, H₂, O₂

Answer

CH₄, CO₂, O₂

Answer

CH₄, CO, H₂O

Question 17

Dilute aqueous sodium chloride is electrolysed using inert electrodes.

25.0 cm³ of hydrogen gas is produced at the negative electrode.

What is the maximum volume and identity of the gas produced at the positive electrode? (Assume all measurements are at the same temperature and pressure.)

Accepted Answer

12.5 cm³ of oxygen

Answer

25.0 cm³ of oxygen

Answer

25.0 cm³ of chlorine

Answer

50.0 cm³ of chlorine

Question 18

Excess aqueous sodium chloride is added to 25 cm³ of 0.1 mol/dm³ lead(II) nitrate.

Pb(NO₃)₂(aq) + 2NaCl(aq) $\rightarrow$ PbCl₂(s) + 2NaNO₃(aq)

What is the maximum mass of lead(II) chloride formed?

Accepted Answer

0.695g

Answer

27.8g

Answer

0.348g

Answer

6.95g

Question 19

The diagrams represent in the arrangement of particles in different substances at 300 ^oC.

Which substance can be electrolysed at 300 ^oC?

Accepted Answer

https://uploads.quizalize.com/b4ef1488-ced8-4e64-afb6-8bc209b8857e/question/71831c10c780d0ca041d325e46a755b61ee0744a.png

Answer

https://uploads.quizalize.com/b4ef1488-ced8-4e64-afb6-8bc209b8857e/question/f09250a9c5b8bff33cd261bfd956df8b0f380e27.png

Answer

https://uploads.quizalize.com/b4ef1488-ced8-4e64-afb6-8bc209b8857e/question/bcc03c619014ac929edd825279757f0429d7bb1a.png

Answer

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Question 20

A simple cell is shown. The electrolyte is a mixture of aqueous copper(II) nitrate and aqueous zinc nitrate.

Which pair of reactions take place in the cell?

Accepted Answer

Zn(s) $_{26}^{56}\mathrm{Fe}^{3+}$ Zn²⁺(aq) + 2e^$-$and Cu²⁺(aq) + 2e^$-$ $\rightarrow$ Cu(s)

Answer

Zn²⁺ (aq) + 2e^$-$ $-$ Zn(s) and Cu(s) $\rightarrow$ Cu²⁺(aq) + 2e^{$\rightarrow$}

Answer

Zn(s) $_{26}^{56}\mathrm{Fe}^{3+}$ Zn²⁺(aq) + 2e^$-$and Cu(s) $\rightarrow$ Cu²⁺(aq) + 2e^$-$

Answer

Cu²⁺(aq) + 2e^$-$ $-$ Cu(s) and Zn²⁺(aq) + 2e^$-$ $\rightarrow$ Zn(s)

Question 21

Ammonia is made from its elements in a reversible reaction.

The energy profile diagram for the formation of ammonia is shown.

Which statement about this reaction is correct?

Accepted Answer

The overall enthalpy change is the same when a catalyst is used.

Answer

The enthalpy change for the formation of one mole of ammonia is equal to x.

Answer

The activation energy for the reverse reaction is equal to y.

Question 22

Bromine reacts rapidly with ethene to form dibromoethane. The equation for the reaction and enthalpy change are shown.

C₂H₄ + Br₂ $\rightarrow$ C₂H₄Br₂ $\Delta H\$ = $-$ 120 kJ/mol

Accepted Answer

The energy released in forming bonds is greater than the energy used in breaking bonds.

Answer

The energy used in forming bonds is less than the energy released in breaking bonds.

Answer

The energy used in forming bonds is greater than the energy released in breaking bonds.

Answer

The energy released in forming bonds is less than the energy used in breaking bonds.

Question 23

Hydrogen peroxide decomposes to produce water and oxygen.

The equation for this reaction is shown.

2H₂O₂ $\rightarrow$ 2H₂O + O₂

An experiment to study the rate of this reaction produces the results shown by curve X.

Using the same volume of hydrogen peroxide, which changes to the reaction conditions could produce the results shown by curve Y?

1 increasing the concentration of hydrogen peroxide

2 using a catalyst

3 increasing the temperature of the hydrogen peroxide

Accepted Answer

2 and 3

Answer

1 and 3

Answer

1 only

Answer

2 only

Question 24

Which chemical changes represent reduction?

1 Cu $\rightarrow$ Cu²⁺

2 I₂ $\rightarrow$ 2I $-$

3 2NO₂ $\rightarrow$ N₂O₅

4 SO₄^{2 $-$} to SO₃^{2 $-$}

Accepted Answer

2 and 4

Answer

1 and 3

Answer

1 and 4

Answer

2 and 3

Question 25

50.0 cm³ of hydrochloric acid has a pH of 1.0.

This acid requires 25.0 cm³ of aqueous sodium hydroxide to be neutralised.

A second 50.0 cm3 solution contains the weak acid, ethanoic acid.

The hydrochloric acid and ethanoic acid have the same concentration.

How will the pH of ethanoic acid and the volume of NaOH needed for neutralisation differ, if at all, from the hydrochloric acid?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 26

Which method of preparation would be suitable for making these salts?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 27

Two substances are mixed and warmed. No visible reaction occurs.

Aluminium foil is added and the mixture is warmed again. The observation is shown.

What are the two substances?

Accepted Answer

KOH and HNO₃

Answer

Na₂CO₃ and H₂SO₄

Answer

NH₄Cl and ZnCl₂

Answer

HCl and Zn

Question 28

Which statement about the alkali metals is correct?

Accepted Answer

There are more protons in an atom of potassium than in an atom of sodium.

Answer

The relative atomic mass, A_r, of lithium is higher than that of sodium.

Answer

The outer electron is further from the nucleus in sodium than in potassium.

Answer

There are more electrons in the valence shell of a potassium atom than in lithium.

Question 29

Part of the Periodic Table is shown.

Which statement about the elements P, Q, R and S is correct?

Accepted Answer

R forms an anion when it reacts with S.

Answer

P has the greatest metallic character.

Answer

S has the highest number of valence electrons.

Answer

Q reacts with P to form the compound PQ₂.

Question 30

Iron, nickel and chromium are all transition elements.

Which properties illustrate this?

1 Iron reacts with dilute hydrochloric acid to form hydrogen.

2 Nickel(II) chloride solution is green.

3 Chromium has oxidation states of +2, +3 and +6.

Accepted Answer

2 and 3 only

Answer

1 and 2 only

Answer

1, 2 and 3

Answer

3 only

Question 31

The diagrams represent atoms in pure gold and atoms in an alloy of gold and copper.

Which statement is correct?

Accepted Answer

The alloy is harder than pure gold.

Answer

The alloy has the same melting point as pure gold.

Answer

The alloy is 75% gold by mass.

Answer

The alloy is a compound of copper and gold.

Question 32

G is a metal. It occurs naturally as an element and sometimes in ores containing its oxide. G forms chloride GCl. No other chloride of G exists.

A student makes some statements about metal G.

1 It can be displaced from solutions containing its ions according to the equation shown. 3G⁺(aq) + Fe(s) $\rightarrow$ Fe³⁺(aq) + 3G(s)

2 It can be extracted from its ore by electrolysis.

3 It can be extracted from its ore by reduction with carbon

4 It is likely to be found as an ore containing the compound G₂O₃.

Which statements are correct?

Accepted Answer

1, 2 and 3

Answer

1 and 3 only

Answer

2 and 4

Answer

3 and 4

Question 33

Brass is an alloy of copper and zinc.

In an experiment, a brass rod is placed separately in contact with four different metals in an electrolyte.

Which metal, when in contact with the brass rod, will result in both metals in brass corroding?

Accepted Answer

silver

Answer

magnesium

Answer

calcium

Answer

sodium

Question 34

The diagram shows the fractional distillation column used to separate petroleum into useful fractions.

Which fractions are produced at positions X, Y and Z in the column?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 35

Which molecular formulae have exactly two isomers?

1 C₃H₈

2 C₄H₈

3 C₄H₁₀

Accepted Answer

3 only

Answer

2 and 3 only

Answer

1 and 2 only

Answer

1, 2 and 3

Question 36

The hydrocarbon C₁₆H₃₄ is cracked to form these products, X, Y and Z. The equation is shown.

Z is used to convert unsaturated vegetable oils into a solid product.

Which row is correct?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 37

An alcohol is completely combusted in excess oxygen. Two products are formed, 1.65 g of carbon dioxide and 0.90 g of water.

What is the formula of the alcohol?

Accepted Answer

C3H7OH

Answer

C3H8OH

Answer

CH3OH

Answer

C2H5OH

Question 38

Butene, CH₂CHCH₂CH₃, is reacted with steam in the presence of an acid catalyst to form compound P.

Compound P reacts with propanoic acid to form ester Q.

What could be the structure of ester Q?

Accepted Answer

1 and 2

Answer

1 only

Answer

3 only

Answer

2 and 3

Question 39

Compound R has the empirical formula C₂H₄O.

What could be the identity of R?

1 butanoic acid

2 ethanoic acid

3 ethanol

4 ethyl ethanoate

Accepted Answer

1 and 4

Answer

1, 2 and 3

Answer

2 and 3 only

Answer

2 and 4

Question 40

Which statement about ozone, O₃, is correct?

Accepted Answer

It absorbs ultraviolet radiation.

Answer

It is an isomer of oxygen.

Answer

It is broken down by fluorine from CFCs.

Answer

It is an isotope of oxygen.

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