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1

‘Particles moving very slowly from an area of higher concentration to an area of lower concentration.’ Which process is being described?

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

1. States of matter  →  1.2. Diffusion

6. Chemical reactions  →  6.2. Rate of reaction

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2

A student mixes 25 cm3 samples of dilute hydrochloric acid with different volumes of aqueous sodium hydroxide. In each case, the student measures the change in temperature to test if the reaction is exothermic. Which piece of apparatus is not needed?

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

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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3

Information about the solubility of four solids, P, Q, R and S, is given in the table. P Q R S solubility in water dissolves insoluble insoluble dissolves A student attempted to separate mixtures of these solids using the following method. Add the mixture to a beaker of water and stir. Filter the mixture. Crystallise one of the solids from the filtrate. Which of the following mixtures could not be separated by this method?

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

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

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4

The table shows information about atoms of three different elements. element proton number nucleon number number of protons number of neutrons number of electrons chlorine W chlorine X argon Y potassium Z What are the values of W, X, Y and Z?

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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5

The diagrams show the structures of two forms of the same element. T U What are the reasons for using T in cutting tools and U as a lubricant?

9. Metals  →  9.3. Alloys and their properties

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

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6

Ions are formed by elements losing or gaining electrons. Which statement is correct?

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

8. The Periodic Table  →  8.1. Arrangement of elements

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7

A molecule of X contains two carbon atoms, four hydrogen atoms and two oxygen atoms. What is the formula of X?

3. Stoichiometry  →  3.1. Formulae

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

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8

Concentrated aqueous potassium chloride is electrolysed using platinum electrodes. The solution contains the ions K+, Cl –, H+ and OH–. Which electrodes are the ions attracted to during this electrolysis?

4. Electrochemistry  →  4.1. Electrolysis

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9

Which apparatus could be used to electroplate an iron nail with copper?

4. Electrochemistry  →  4.1. Electrolysis

9. Metals  →  9.5. Corrosion of metals

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10

When anhydrous copper(sulfate is added to water a solution is formed and heat is given out. water anhydrous copper(sulfate thermometer Which row shows the temperature change and the type of reaction taking place?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

4. Electrochemistry  →  4.1. Electrolysis

10. Chemistry of the environment  →  10.1. Water

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11

The combustion of element X releases large amounts of energy. What is X?

11. Organic chemistry  →  11.6. Alcohols

11. Organic chemistry  →  11.3. Fuels

11. Organic chemistry  →  11.2. Naming organic compounds

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12

The rate of reaction between magnesium and excess dilute hydrochloric acid was followed by measuring the mass of magnesium present at regular time intervals. Two experiments were performed. Both experiments used 0.1 g of magnesium ribbon. The acid in experiment 1 was less concentrated than in experiment 2. Which graph shows the results of the experiments?

6. Chemical reactions  →  6.2. Rate of reaction

9. Metals  →  9.4. Reactivity series

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13

Which reaction is reversible?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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14

Tin is formed when tin(oxide is heated with carbon. What happens to the tin in the tin(oxide in this reaction?

4. Electrochemistry  →  4.1. Electrolysis

6. Chemical reactions  →  6.4. Redox

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15

Part of the Periodic Table is shown...

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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16

Four substances, P, Q, R and S, are tested as shown...

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

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17

Acids can react with metal oxides, carbonates and metals. Which reactions produce a gas?

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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18

The apparatus shown...

4. Electrochemistry  →  4.1. Electrolysis

10. Chemistry of the environment  →  10.1. Water

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19

Which statement about trends in the Periodic Table is not correct?

8. The Periodic Table  →  8.1. Arrangement of elements

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20

What is not a property of Group I metals?

9. Metals  →  9.1. Properties of metals

8. The Periodic Table  →  8.2. Group I properties

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21

Which statement about the element with proton number 54 is correct?

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

8. The Periodic Table  →  8.4. Transition elements

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22

Which element is a transition element?

8. The Periodic Table  →  8.4. Transition elements

10. Chemistry of the environment  →  10.1. Water

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23

Which row describes the trends in the properties of the Group VII elements as the group is descended?

8. The Periodic Table  →  8.1. Arrangement of elements

8. The Periodic Table  →  8.3. Group VII properties

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24

Four metals are listed in decreasing order of reactivity. magnesium zinc iron copper Titanium reacts with acid and cannot be extracted from its ore by heating with carbon. Where should titanium be placed in the list?

9. Metals  →  9.4. Reactivity series

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25

Impure iron from the blast furnace is converted to steel as shown...

9. Metals  →  9.6. Extraction of metals

9. Metals  →  9.5. Corrosion of metals

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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26

A student added dilute hydrochloric acid to four metals and recorded the results. Some of the results are not correct. results metal gas given off copper yes iron yes magnesium no zinc yes Which two results are correct?

9. Metals  →  9.4. Reactivity series

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

9. Metals  →  9.1. Properties of metals

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27

Some properties of three metals, P, Q and R, are shown...

9. Metals  →  9.2. Uses of metals

9. Metals  →  9.1. Properties of metals

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

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28

One sample of sea-water is distilled while another sample of sea-water is filtered. Which statement about the samples is correct?

10. Chemistry of the environment  →  10.1. Water

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29

Air is a mixture of gases. Which gas is present in the largest amount?

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

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30

Which information about carbon dioxide and methane is correct?

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

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31

A mixture of two substances, X and Y, is heated. The damp, red litmus paper turns blue. damp, red litmus paper X and Y gentle heat What are X and Y?

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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

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32

In the experiment shown...

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

4. Electrochemistry  →  4.1. Electrolysis

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33

Which box corresponds to limestone?

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34

Petroleum is an important fossil fuel. Which row correctly describes petroleum?

11. Organic chemistry  →  11.3. Fuels

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35

Butane reacts as shown...

11. Organic chemistry  →  11.5. Alkenes

11. Organic chemistry  →  11.6. Alcohols

6. Chemical reactions  →  6.2. Rate of reaction

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36

Which substance is in the same homologous series as methanol?

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

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37

Which statement could not be correct for an alkane?

11. Organic chemistry  →  11.4. Alkanes

11. Organic chemistry  →  11.5. Alkenes

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38

In which conical flask will ethanol be produced?

11. Organic chemistry  →  11.6. Alcohols

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39

Which molecule can be polymerised?

11. Organic chemistry  →  11.8. Polymers

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40

Which row describes what happens when ethanol burns in air?

11. Organic chemistry  →  11.6. Alcohols

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

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