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1

In which changes do the particles move further apart?

1. States of matter  →  1.1. Solids, liquids and gases

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2

The table shows the structure of different atoms and ions. particle proton number nucleon number number of protons number of neutrons number of electrons Mg W Mg2+ X F Y F– Z What are the values of W, X, Y and Z?

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

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3

Element X has a nucleon number of 19 and a proton number of 9. To which group in the Periodic Table does it belong?

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

8. The Periodic Table  →  8.1. Arrangement of elements

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4

A mixture of ethanol and methanol are separated by fractional distillation. This method of separation depends on a difference in property X of these two alcohols. What is property X?

11. Organic chemistry  →  11.3. Fuels

12. Experimental techniques and chemical analysis  →  12.4. Separation and purification

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5

Chromatography is used to find out if a banned dye, P, is present in foodstuffs. The results are shown...

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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6

Which diagram does not show the outer shell electrons in the molecule correctly?

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

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

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

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7

Two isotopes of hydrogen are H 1 and H . Which diagram shows the arrangement of particles in the two isotopes?

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

2. Atoms, elements and compounds  →  2.3. Isotopes

8. The Periodic Table  →  8.1. Arrangement of elements

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8

The chemical compositions of two substances, W and X, are given. W Na(Al Si3)O8 X Ca(Al 2Si2)O8 Which statements are correct?

9. Metals  →  9.1. Properties of metals

8. The Periodic Table  →  8.1. Arrangement of elements

2. Atoms, elements and compounds  →  2.1. Elements, compounds and mixtures

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9

The electronic structures of atoms X and Y are shown...

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

3. Stoichiometry  →  3.1. Formulae

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10

Element X is shiny and can be formed into a sheet by hammering. Which row correctly describes the properties of element X?

9. Metals  →  9.3. Alloys and their properties

8. The Periodic Table  →  8.1. Arrangement of elements

9. Metals  →  9.1. Properties of metals

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11

Substance X was electrolysed in an electrolytic cell. A coloured gas was formed at the anode and a metal was formed at the cathode. cathode substance X anode power supply What is substance X?

4. Electrochemistry  →  4.1. Electrolysis

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12

The diagram shows apparatus used in an attempt to electroplate a metal ring with copper. + – aqueous copper(sulfate metal ring copper electrode bulb The experiment did not work. What change is needed in the experiment to make it work?

4. Electrochemistry  →  4.1. Electrolysis

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13

When concentrated sodium chloride solution is electrolysed, elements X and Y are formed. X – + Y concentrated sodium chloride solution What are X and Y?

4. Electrochemistry  →  4.1. Electrolysis

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

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14

Calcium carbonate was reacted with hydrochloric acid in a conical flask. The flask was placed on a balance and the mass of the flask and contents was recorded as the reaction proceeded. During the reaction, carbon dioxide gas was given off. The reaction was carried out at two different temperatures. Which row is correct?

6. Chemical reactions  →  6.2. Rate of reaction

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15

Which is an endothermic process?

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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16

The diagrams show some pieces of laboratory equipment. thermometer stop-clock balance Which equipment is needed to find out whether dissolving salt in water is an endothermic process?

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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

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17

Which reaction will result in a decrease in pH?

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

9. Metals  →  9.4. Reactivity series

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18

When pink crystals of cobalt(chloride are heated, steam is given off and the colour of the solid changes to blue. CoCl2.6H2O CoCl2 + 6H2O What happens when water is added to the blue solid?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

10. Chemistry of the environment  →  10.1. Water

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

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19

The red colour in some pottery glazes may be formed as a result of the reactions shown...

6. Chemical reactions  →  6.4. Redox

9. Metals  →  9.4. Reactivity series

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20

Some barium iodide is dissolved in water. Aqueous lead(nitrate is added to the solution until no more precipitate forms. This precipitate, X, is filtered off. Dilute sulfuric acid is added to the filtrate and another precipitate, Y, forms. What are the colours of precipitates X and Y?

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

4. Electrochemistry  →  4.1. Electrolysis

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

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21

The table shows some reactions of the halogens. Which reaction is the most likely to be explosive?

8. The Periodic Table  →  8.3. Group VII properties

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22

Which compound is likely to be coloured?

6. Chemical reactions  →  6.4. Redox

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

8. The Periodic Table  →  8.4. Transition elements

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23

A salt is made by adding an excess of an insoluble metal oxide to an acid. How can the excess metal oxide be removed?

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

12. Experimental techniques and chemical analysis  →  12.4. Separation and purification

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24

The oxide of element X was added to an acid. It reacted to form a salt and water. acid oxide of element X What is the pH of the acid before the reaction and what type of element is X?

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

7. Acids, bases and salts  →  7.2. Oxides

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25

The diagram shows the positions of elements P, Q, R, S and T in the Periodic Table. These letters are not the chemical symbols for the elements. P Q R S T Which statement about the properties of these elements is correct?

8. The Periodic Table  →  8.1. Arrangement of elements

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26

The table compares the properties of Group I elements with those of transition elements. Which entry in the table is correct?

8. The Periodic Table  →  8.4. Transition elements

8. The Periodic Table  →  8.3. Group VII properties

8. The Periodic Table  →  8.2. Group I properties

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27

Which pollutant, found in car exhaust fumes, does not come from the fuel?

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

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28

The diagram shows the materials used in the production of steel from impure iron. impure iron steel an oxide of element X oxygen What could element X be?

9. Metals  →  9.6. Extraction of metals

9. Metals  →  9.5. Corrosion of metals

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29

Which property do all metals have?

9. Metals  →  9.1. Properties of metals

9. Metals  →  9.3. Alloys and their properties

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30

Which diagram could represent the structure of an alloy?

9. Metals  →  9.3. Alloys and their properties

11. Organic chemistry  →  11.8. Polymers

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31

Some metals react readily with dilute hydrochloric acid. Some metals can be extracted by heating their oxides with carbon. For which metal are both statements correct?

9. Metals  →  9.4. Reactivity series

9. Metals  →  9.6. Extraction of metals

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32

Which diagram shows a common use of stainless steel?

9. Metals  →  9.3. Alloys and their properties

9. Metals  →  9.2. Uses of metals

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33

Why is chlorination used in water treatment?

10. Chemistry of the environment  →  10.1. Water

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34

A test-tube containing damp iron wool is inverted in water. After three days, the water level inside the test-tube has risen. water damp iron wool Which statement explains this rise?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

10. Chemistry of the environment  →  10.1. Water

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35

A bag of fertiliser ‘Watch it grow’ contains ammonium sulfate and potassium sulfate. Which of the three elements N, P and K does ‘Watch it grow’ contain?

10. Chemistry of the environment  →  10.2. Fertilisers

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

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36

Which information about carbon dioxide and methane is correct?

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

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37

Ethene reacts with Y to produce ethanol. ethene + Y → ethanol What is Y?

11. Organic chemistry  →  11.6. Alcohols

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38

In an oil refinery, crude oil is separated into useful fractions. The diagram shows some of these fractions. pre-heat 400 °C refinery gases gasolene X diesel Y Z What are fractions X, Y and Z?

11. Organic chemistry  →  11.3. Fuels

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39

The diagram shows the structure of a compound. H C H C H H C H O H H C H To which classes of compound does this molecule belong?

11. Organic chemistry  →  11.2. Naming organic compounds

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40

Which structures show compounds that are members of the same homologous series?

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

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