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1

Hydrogen chloride gas (Mr = 36.5) is released at P in the apparatus shown...

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

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

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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2

Which piece of apparatus is used to measure 24.8 cm3 of gas produced during a reaction?

12. Experimental techniques and chemical analysis  →  12.1. Experimental design

12. Experimental techniques and chemical analysis  →  12.2. Acid-base titrations

6. Chemical reactions  →  6.2. Rate of reaction

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3

Rf values are used to identify unknown substances using paper chromatography. Which statements about Rf values are correct?

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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4

The structure of an atom is shown...

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

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5

Which row describes the formation of single covalent bonds in methane?

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

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6

Which statement describes the structure of an ionic compound?

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

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7

When propane burns in air, carbon dioxide and water are formed. What is the chemical equation for this reaction?

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

3. Stoichiometry  →  3.1. Formulae

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8

What is the concentration of a solution that contains 25.0 g NaOH in 500 cm3 of water?

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

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9

An aqueous solution of copper(sulfate was electrolysed using copper electrodes. copper anode copper cathode aqueous copper(sulfate power supply + – Which equation for the reaction at the anode is correct?

4. Electrochemistry  →  4.1. Electrolysis

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10

In the manufacture of aluminium by electrolysis, aluminium oxide is dissolved in molten cryolite. Why is cryolite used?

9. Metals  →  9.6. Extraction of metals

9. Metals  →  9.4. Reactivity series

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11

Which statement about a fuel cell in a car is correct?

4. Electrochemistry  →  4.2. Hydrogen–oxygen fuel cells

11. Organic chemistry  →  11.6. Alcohols

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12

Methane burns in oxygen to form carbon dioxide and water. CH4+ 2O2→ CO2+ 2H2OThe bond energies are shown...

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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13

Which change in reaction conditions increases both the collision rate and the proportion of molecules with sufficient energy to react?

6. Chemical reactions  →  6.2. Rate of reaction

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14

When blue-green crystals of nickel(sulfate are heated, water is produced and a yellow solid remains. When water is added to the yellow solid, the blue-green colour returns. Which process describes these changes?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

9. Metals  →  9.4. Reactivity series

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15

A reaction between nitrogen and oxygen is shown...

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

6. Chemical reactions  →  6.2. Rate of reaction

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16

Which changes represent reduction?

6. Chemical reactions  →  6.4. Redox

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17

Which statement about carbon monoxide and aluminium oxide is correct?

7. Acids, bases and salts  →  7.2. Oxides

9. Metals  →  9.4. Reactivity series

9. Metals  →  9.6. Extraction of metals

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18

The positions of elements W, X, Y and Z in the Periodic Table are shown...

8. The Periodic Table  →  8.1. Arrangement of elements

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19

Solutions of acid R and acid S have the same concentration. The same volume of each acid at the same temperature is reacted with the same mass of magnesium ribbon. The volume of hydrogen produced is measured. The results are shown...

6. Chemical reactions  →  6.2. Rate of reaction

9. Metals  →  9.4. Reactivity series

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20

Part of the Periodic Table is shown...

8. The Periodic Table  →  8.1. Arrangement of elements

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

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21

Which statement about the properties of elements in Group I and in Group VII is correct?

8. The Periodic Table  →  8.3. Group VII properties

8. The Periodic Table  →  8.2. Group I properties

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22

Gas G has 10 electrons. Gas H has eight more electrons than gas G. Both gases are monoatomic. Which statement about G and H is correct?

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

8. The Periodic Table  →  8.5. Noble gases

8. The Periodic Table  →  8.1. Arrangement of elements

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23

The diagrams show the structure of two substances used to make electrical conductors. X Y Which statement correctly describes X and Y?

9. Metals  →  9.3. Alloys and their properties

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

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24

Magnesium nitrate, magnesium hydroxide and magnesium carbonate all decompose when heated. Which statement about these decomposition reactions is correct?

9. Metals  →  9.4. Reactivity series

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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25

Zinc is extracted from its ore, zinc blende, using two chemical reactions. 2ZnS + 3O2 → 2ZnO + 2SO2 2ZnO + C → 2Zn + CO2 Which substance is reduced in reactions 1 and 2?

6. Chemical reactions  →  6.4. Redox

9. Metals  →  9.4. Reactivity series

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26

Four metals, zinc, M, copper and magnesium, are reacted with aqueous solutions of their nitrates. The results are shown...

9. Metals  →  9.4. Reactivity series

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27

Aluminium is used to make containers for storing food. Which property makes it suitable for this use?

9. Metals  →  9.2. Uses of metals

9. Metals  →  9.3. Alloys and their properties

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28

Water can be treated by filtration then chlorination. Which uses do not need water of this quality?

10. Chemistry of the environment  →  10.1. Water

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29

Catalytic converters in car exhausts change polluting gases into non-polluting gases. Which statements about oxides of nitrogen and car engines are correct?

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

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30

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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31

Which row about the carbon cycle is correct?

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

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32

Ammonia is manufactured in an exothermic reaction. N2+ 3H22NH3What is the effect of lowering the temperature on the rate of formation and equilibrium yield of ammonia?

6. Chemical reactions  →  6.2. Rate of reaction

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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33

Which row shows the conditions used in the Contact process?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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34

The diagram represents a lime kiln used to heat limestone to a very high temperature. air in fuel in fuel in air in X waste gases limestone lime kiln What leaves the kiln at X?

9. Metals  →  9.6. Extraction of metals

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

9. Metals  →  9.4. Reactivity series

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35

Which fuel could be gasoline?

11. Organic chemistry  →  11.3. Fuels

11. Organic chemistry  →  11.6. Alcohols

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36

Which statements about homologous series are correct?

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

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37

Which type of reaction takes place when methane reacts with chlorine in the presence of ultraviolet light?

11. Organic chemistry  →  11.4. Alkanes

11. Organic chemistry  →  11.5. Alkenes

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38

Which statement about aqueous ethanoic acid is correct?

11. Organic chemistry  →  11.7. Carboxylic acids

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

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39

The structure of ester W is shown...

11. Organic chemistry  →  11.7. Carboxylic acids

11. Organic chemistry  →  11.2. Naming organic compounds

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40

A section of a polymer is shown...

11. Organic chemistry  →  11.8. Polymers

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