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1

The rate of diffusion of two gases, methane, CH4, and ethene, C2H4, is measured using the apparatus shown...

1. States of matter  →  1.2. Diffusion

6. Chemical reactions  →  6.2. Rate of reaction

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2

A sample of a dye is investigated by chromatography. A line is drawn across a piece of chromatography paper and a spot of the dye is placed on it. The paper is placed in water. water chromatography paper line spot of dye Which row is correct?

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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3

The paper chromatogram below was obtained from four different dyes. Which dye has an Rf value of 0.7?

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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4

Which statements about isotopes of the same element are correct?

2. Atoms, elements and compounds  →  2.3. Isotopes

8. The Periodic Table  →  8.1. Arrangement of elements

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5

The table shows the electronic structure of four atoms. atom electronic structure W 2,8,1 X 2,8,4 Y 2,8,7 Z 2,8,8 Which two atoms combine to form a covalent compound?

2. Atoms, elements and compounds  →  2.5. Simple molecules and covalent bonds

2. Atoms, elements and compounds  →  2.2. Atomic structure and the Periodic Table

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6

Which statement describes the attractive forces between molecules (intermolecular forces)?

2. Atoms, elements and compounds  →  2.5. Simple molecules and covalent bonds

2. Atoms, elements and compounds  →  2.4. Ions and ionic bonds

2. Atoms, elements and compounds  →  2.7. Metallic bonding

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7

The diagram represents the general structure of a solid Z. + + + + + + + + + – – – – – – – – – What is Z?

2. Atoms, elements and compounds  →  2.6. Giant covalent structures

9. Metals  →  9.3. Alloys and their properties

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8

A compound, X, contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. The relative molecular mass, Mr, of X is 60. What is the molecular formula of X?

3. Stoichiometry  →  3.2. Relative masses of atoms and molecules

3. Stoichiometry  →  3.3. The mole and the Avogadro constant

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9

25 cm3 of 0.1 mol / dm3 hydrochloric acid exactly neutralise 20 cm3 of aqueous sodium hydroxide. The equation for this reaction is: NaOH + HCl → NaCl + H2O What is the concentration of the sodium hydroxide solution?

3. Stoichiometry  →  3.3. The mole and the Avogadro constant

7. Acids, bases and salts  →  7.1. The characteristic properties of acids and bases

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10

Which reactions could take place at the anode during electrolysis?

4. Electrochemistry  →  4.1. Electrolysis

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11

The diagram shows some properties that substances may have. To which labelled part of the diagram does 235U belong?

10. Chemistry of the environment  →  10.1. Water

8. The Periodic Table  →  8.4. Transition elements

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12

The diagram shows a simple cell. voltmeter copper electrode zinc electrode electrolyte V Which statement about the process occurring when the cell is in operation is correct?

4. Electrochemistry  →  4.1. Electrolysis

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13

Hydrogen burns exothermically in oxygen. The equation for the reaction is: 2H2 + O2 → 2H2O The table shows the bond energies involved. bond bond energy in kJ / mol H–H O=O O–H What is the energy given out during the reaction?

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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14

A liquid X reacts with solid Y to form a gas. Which two diagrams show suitable methods for investigating the rate of the reaction?

6. Chemical reactions  →  6.2. Rate of reaction

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15

Which statements explain why increasing temperature increases the rate of a chemical reaction?

6. Chemical reactions  →  6.2. Rate of reaction

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16

Steam reacts with carbon in an endothermic reaction. C+ H2OCO+ H2Which conditions of temperature and pressure would give the largest yield of hydrogen?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

11. Organic chemistry  →  11.5. Alkenes

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17

Which equation represents a reduction reaction?

6. Chemical reactions  →  6.4. Redox

4. Electrochemistry  →  4.1. Electrolysis

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18

Which statements are properties of an acid?

7. Acids, bases and salts  →  7.1. The characteristic properties of acids and bases

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19

Which row describes whether an amphoteric oxide reacts with acids and bases?

7. Acids, bases and salts  →  7.2. Oxides

7. Acids, bases and salts  →  7.1. The characteristic properties of acids and bases

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20

Which substance reacts with dilute sulfuric acid to form a salt that can be removed from the resulting mixture by filtration?

7. Acids, bases and salts  →  7.3. Preparation of salts

12. Experimental techniques and chemical analysis  →  12.5. Identification of ions and gases

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21

Where in the Periodic Table is the metallic character of the elements greatest?

8. The Periodic Table  →  8.1. Arrangement of elements

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22

Some properties of four elements, P, Q, R and S, are shown...

8. The Periodic Table  →  8.1. Arrangement of elements

8. The Periodic Table  →  8.3. Group VII properties

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23

Which of the following could be a transition element?

8. The Periodic Table  →  8.4. Transition elements

10. Chemistry of the environment  →  10.1. Water

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24

Two statements about argon are given. Argon has a full outer shell of electrons. Argon is very reactive and is used in lamps. Which is correct?

2. Atoms, elements and compounds  →  2.2. Atomic structure and the Periodic Table

2. Atoms, elements and compounds  →  2.5. Simple molecules and covalent bonds

8. The Periodic Table  →  8.5. Noble gases

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25

A student investigated the reactions of four metals, R, S, T and U, with solutions of their salts. The results are given in the table. metal metal salt result R R S S nitrate T nitrate U nitrate reacts reacts no reaction T U nitrate reacts U R nitrate no reaction What is the order of reactivity of the metals, most reactive first?

9. Metals  →  9.4. Reactivity series

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26

Three students, X, Y and Z, were told that solid P reacts with dilute acids and also conducts electricity. The table shows the students’ suggestions about the identity of P. X Y Z copper iron graphite Which of the students are correct?

4. Electrochemistry  →  4.1. Electrolysis

9. Metals  →  9.4. Reactivity series

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27

Which statement about the uses of metals is correct?

9. Metals  →  9.2. Uses of metals

9. Metals  →  9.3. Alloys and their properties

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28

Aluminium is manufactured by electrolysis of aluminium oxide. The diagram shows the electrolysis cell. molten aluminium aluminium oxide in molten cryolite cathode anode + + Which statement about the process is not correct?

9. Metals  →  9.6. Extraction of metals

4. Electrochemistry  →  4.1. Electrolysis

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29

The diagram shows an experiment to investigate how paint affects the rusting of iron. air P Q water iron painted iron What happens to the water level in tubes P and Q?

9. Metals  →  9.5. Corrosion of metals

9. Metals  →  9.6. Extraction of metals

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30

A new planet has been discovered and its atmosphere has been analysed. atmosphere planet The table shows the composition of its atmosphere. gas percentage by volume carbon dioxide nitrogen oxygen Which gases are present in the atmosphere of the planet in a higher percentage than they are in the Earth’s atmosphere?

10. Chemistry of the environment  →  10.3. Air quality and climate

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31

Many car exhaust systems contain a catalytic converter. Which change does not occur in a catalytic converter?

10. Chemistry of the environment  →  10.3. Air quality and climate

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32

Ammonia is formed by a reversible reaction. N2+ 3H22NH3The forward reaction is exothermic. Which changes in conditions would increase the yield of ammonia?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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33

The equation for an exothermic reaction in the Contact process is shown...

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

6. Chemical reactions  →  6.2. Rate of reaction

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34

A farmer’s soil is very low in both nitrogen (N) and phosphorus (P). Which fertiliser would improve the quality of this soil most effectively?

10. Chemistry of the environment  →  10.2. Fertilisers

10. Chemistry of the environment  →  10.3. Air quality and climate

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35

The diagram shows the separation of petroleum into fractions. gasoline X Y Z bitumen petroleum What could X, Y and Z represent?

11. Organic chemistry  →  11.3. Fuels

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36

Which of the compounds shown...

11. Organic chemistry  →  11.1. Formulae, functional groups and terminology

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37

Which compounds contain the same number of carbon, hydrogen and oxygen atoms?

11. Organic chemistry  →  11.2. Naming organic compounds

11. Organic chemistry  →  11.3. Fuels

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38

What is an advantage of producing ethanol by fermentation of sugar compared to the catalytic addition of steam to ethene?

11. Organic chemistry  →  11.6. Alcohols

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39

The structure of a monomer is shown...

11. Organic chemistry  →  11.8. Polymers

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40

Which formula represents a polyester?

11. Organic chemistry  →  11.8. Polymers

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