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1

The fractional distillation apparatus shown...

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

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

11. Organic chemistry  →  11.3. Fuels

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2

The concentration of aqueous sodium carbonate can be found by reaction with hydrochloric acid of known concentration using the indicator methyl orange. Which items of equipment are needed?

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

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

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

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3

Which molecules all contain one or more double covalent bonds?

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

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

11. Organic chemistry  →  11.5. Alkenes

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4

The metals Cr, Co, Fe and Mn are all transition elements. Which particles have the same number of electrons?

8. The Periodic Table  →  8.1. Arrangement of elements

8. The Periodic Table  →  8.4. Transition elements

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5

Which substance has metallic bonding?

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

9. Metals  →  9.1. Properties of metals

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6

Which compound contains only eight covalent bonds?

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

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

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7

The table shows the results of two reactions of an aqueous solution of a salt. reagents final observation excess aqueous sodium hydroxide white precipitate dilute nitric acid and aqueous silver nitrate white precipitate What could be the identity of the salt?

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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8

Which row shows correct statements about the speed at which a gas diffuses?

1. States of matter  →  1.2. Diffusion

11. Organic chemistry  →  11.3. Fuels

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9

What happens when sodium chloride melts?

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

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

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10

Using the Periodic Table for the relative atomic masses, which has the greatest mass?

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

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

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11

Ammonia is manufactured from nitrogen and hydrogen by the Haber process. N2+ 3H22NH3What is the percentage yield when 60 kg of ammonia is produced from 60 kg of hydrogen?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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

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12

What is the relative molecular mass, Mr, of CuSO4.5H2O?

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

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

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13

The list shows some substances that conduct electricity. aqueous sodium chloride copper graphite In which substanceare only electrons involved in the conduction?

4. Electrochemistry  →  4.1. Electrolysis

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14

Caesium is a Group I metal. Which reaction involving this element would not produce hydrogen?

4. Electrochemistry  →  4.1. Electrolysis

4. Electrochemistry  →  4.2. Hydrogen–oxygen fuel cells

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15

The energy diagram represents a chemical reaction carried out both with a catalyst and without a catalyst. enthalpy kJ / mol reaction pathway uncatalysed reaction catalysed reaction reactants products What is the enthalpy change for the catalysed reaction?

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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16

Hydrogen reacts with iodine to form hydrogen iodide. This is a slow reaction. H2+ I22HI1 mole of hydrogen gas and 1 mole of iodine vapour were mixed and allowed to react. After t seconds, 0.6 moles of hydrogen remained. What is the number of moles of iodine remaining after t seconds?

6. Chemical reactions  →  6.2. Rate of reaction

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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17

Acidified potassium manganate(is used as a test reagent. When it is added to an aqueous solution of compound X, the colour of the test reagent changes from 1 . This colour change shows that X is 2 . Which words correctly complete gaps 1 and 2?

6. Chemical reactions  →  6.4. Redox

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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18

You are supplied with dilute hydrochloric acid together with • copper solid, • magnesium solid, • aqueous lead nitrate, • aqueous silver nitrate. How many different insoluble chlorides could you make?

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

9. Metals  →  9.4. Reactivity series

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

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19

In the graph, curve 1 was obtained by observing the decomposition of 100 cm3 of 1.0 mol / dm3 hydrogen peroxide solution, catalysed by manganese(oxide. 2H2O2 → 2H2O + O2 volume of oxygen formed time Which alteration to the original experimental conditions would produce curve 2?

6. Chemical reactions  →  6.4. Redox

6. Chemical reactions  →  6.2. Rate of reaction

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20

A colourless solution reacts with magnesium to form a salt and hydrogen gas. How is this solution acting?

9. Metals  →  9.4. Reactivity series

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

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21

The equation shows a redox reaction between iron(chloride and chlorine gas. 2FeCl 2 + Cl 2 → 2FeCl 3 Which equation describes the reduction process in this reaction?

6. Chemical reactions  →  6.4. Redox

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22

Which compound produces the greatest number of ions when 1 mole is dissolved in water?

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

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

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23

The equation for the reaction taking place during the production of ammonia is shown...

6. Chemical reactions  →  6.2. Rate of reaction

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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24

Which element is sodium?

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

8. The Periodic Table  →  8.2. Group I properties

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

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25

From their position in the Periodic Table, what would you expect the elements titanium, vanadium, chromium and cobalt to have in common?

8. The Periodic Table  →  8.1. Arrangement of elements

8. The Periodic Table  →  8.4. Transition elements

9. Metals  →  9.1. Properties of metals

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26

Which two gases do not damage limestone buildings?

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

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27

The following facts are known about four metals, P, Q, R and S. R displaces both P and S from aqueous solutions of their ions. Q reacts with water but R does not react with water. S does not react with acid but P does react with acid. What is the correct order of reactivity, the most reactive first?

9. Metals  →  9.4. Reactivity series

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28

Which metal has to be extracted from its ore by electrolysis?

4. Electrochemistry  →  4.1. Electrolysis

9. Metals  →  9.6. Extraction of metals

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29

Aluminium is produced by the electrolysis of molten aluminium oxide. waste gases carbon electrode carbon electrodes purified aluminium oxide dissolved in molten cryolite molten aluminium Which statement about the process is correct?

9. Metals  →  9.6. Extraction of metals

4. Electrochemistry  →  4.1. Electrolysis

9. Metals  →  9.4. Reactivity series

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30

Hydrides are compounds of an element and hydrogen only. Which statement is not correct?

11. Organic chemistry  →  11.3. Fuels

4. Electrochemistry  →  4.2. Hydrogen–oxygen fuel cells

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31

In the extraction of iron from its ore in the blast furnace, limestone is added. What is the function of the limestone?

9. Metals  →  9.6. Extraction of metals

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32

Two pieces of iron, one with zinc attached and the other with copper attached, are placed separately in water as shown...

9. Metals  →  9.5. Corrosion of metals

9. Metals  →  9.3. Alloys and their properties

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33

A diagram of a biogas generator is shown...

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

11. Organic chemistry  →  11.3. Fuels

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34

Which statement about alkanes is correct?

11. Organic chemistry  →  11.4. Alkanes

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35

Which statement about members of the homologous series of alcohols is correct?

11. Organic chemistry  →  11.6. Alcohols

11. Organic chemistry  →  11.2. Naming organic compounds

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36

When cracked, one mole of a compound, X, produces one mole of propene and one mole of hydrogen. X → C3H6 + H2 What type of compound is X?

11. Organic chemistry  →  11.5. Alkenes

11. Organic chemistry  →  11.7. Carboxylic acids

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37

The diagram shows the partial structure of a polymer. N H C O N H C O N H C O Which pair of reagents could have been used to form this polymer?

11. Organic chemistry  →  11.8. Polymers

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38

Which of the following has not been prepared by reacting a carboxylic acid with an alcohol?

11. Organic chemistry  →  11.7. Carboxylic acids

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39

Which statement about the properties of the four alkanes from methane to butane is not correct?

11. Organic chemistry  →  11.4. Alkanes

11. Organic chemistry  →  11.3. Fuels

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40

Which of these polymers is a protein?

11. Organic chemistry  →  11.8. Polymers

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