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1

The formula of methane is CH4 and the formula of ethane is C2H6. Which row describes diffusion and the relative rates of diffusion of methane and ethane?

1. States of matter  →  1.2. Diffusion

11. Organic chemistry  →  11.3. Fuels

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2

Which test is used to show that a sample of water is pure?

10. Chemistry of the environment  →  10.1. Water

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

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3

Chromatography is used to separate and identify the components in both coloured and colourless mixtures. For colourless mixtures the chromatogram has to be treated with another chemical. What is the name of this type of chemical?

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

6. Chemical reactions  →  6.4. Redox

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4

Lithium reacts with fluorine to form the compound lithium fluoride. Which statement about this reaction is correct?

11. Organic chemistry  →  11.4. Alkanes

11. Organic chemistry  →  11.5. Alkenes

4. Electrochemistry  →  4.1. Electrolysis

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5

C and C are isotopes of carbon. Which statement about these isotopes is correct?

2. Atoms, elements and compounds  →  2.3. Isotopes

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

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6

The molecular structure of hydrazine, N2H4, is shown...

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

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7

Solid X has a high boiling point. Its structure has positive ions surrounded by a sea of electrons. Which other properties does solid X have?

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

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

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8

The formulae of some ions are shown...

3. Stoichiometry  →  3.1. Formulae

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

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9

The equation for the decomposition of magnesium nitrate is shown...

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

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

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10

Which statements about the electrolysis of molten lead(bromide are correct?

4. Electrochemistry  →  4.1. Electrolysis

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11

Aqueous copper(sulfate is electrolysed using carbon electrodes. Which statement is correct?

4. Electrochemistry  →  4.1. Electrolysis

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12

Nitrogen trifluoride, NF3, is used in the manufacture of certain types of solar panels. The equation for the formation of nitrogen trifluoride is shown...

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

6. Chemical reactions  →  6.2. Rate of reaction

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13

Which statements about hydrogen fuel cells are correct?

4. Electrochemistry  →  4.2. Hydrogen–oxygen fuel cells

4. Electrochemistry  →  4.1. Electrolysis

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14

Which change is a physical change?

6. Chemical reactions  →  6.1. Physical and chemical changes

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

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15

A student adds excess magnesium ribbon to 10 cm3 of 0.5 mol / dm3 sulfuric acid. The hydrogen gas is collected and its volume measured every 10 seconds. The experiment is repeated using the same mass of magnesium ribbon with 5 cm3 of 0.5 mol / dm3 sulfuric acid added to 5 cm3 of water. Which graph shows the results of the second experiment?

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

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

1. States of matter  →  1.2. Diffusion

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16

An equilibrium reaction is shown...

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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17

In which reaction is the underlined compound acting as a reducing agent?

6. Chemical reactions  →  6.4. Redox

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18

X, Y and Z are oxides of elements in the same row of the Periodic Table. Some information about each oxide is shown...

7. Acids, bases and salts  →  7.2. Oxides

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19

Four different acids are dissolved in water. Which beaker contains the most concentrated strong acid solution?

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

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20

The following substances can be reacted together to prepare salts. copper(oxide and excess hydrochloric acid hydrochloric acid and excess sodium hydroxide hydrochloric acid and excess zinc carbonate In which reactions can the excess reactant be separated from the solution by filtration?

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

9. Metals  →  9.4. Reactivity series

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

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21

Salt S is dissolved in water and three tests are carried out on the solution. test result aqueous sodium hydroxide is added green precipitate formed, insoluble in excess sodium hydroxide dilute nitric acid is added no reaction aqueous barium nitrate is added to the acidified solution from test 2 white precipitate formed What is the identity of S?

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

10. Chemistry of the environment  →  10.1. Water

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22

Which statement about the Periodic Table is correct?

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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23

The diagram shows elements W, X, Y and Z in a section of the Periodic Table. X Y Z W Which statement about the reactivity of the elements is correct?

9. Metals  →  9.4. Reactivity series

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24

Some properties of substances are listed. They conduct electricity. They have low densities. They have high melting points. They are malleable. Which properties are shown...

9. Metals  →  9.1. Properties of metals

8. The Periodic Table  →  8.4. Transition elements

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25

Sodium is a Group I metal. Which property, that is typical of most metals, is not shown...

8. The Periodic Table  →  8.2. Group I properties

9. Metals  →  9.1. Properties of metals

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26

Four metals, iron, copper, magnesium and Y, are heated separately with their oxides. The results are shown...

9. Metals  →  9.4. Reactivity series

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27

Aluminium is extracted from bauxite by electrolysis. Which statement is correct?

9. Metals  →  9.6. Extraction of metals

4. Electrochemistry  →  4.1. Electrolysis

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28

Some properties of aluminium are listed. It conducts heat. It has a low density. It is strong. It is resistant to corrosion. Which of these properties make aluminium suitable for making food containers for chilled food products?

9. Metals  →  9.2. Uses of metals

9. Metals  →  9.1. Properties of metals

9. Metals  →  9.3. Alloys and their properties

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29

Water is treated at a waterworks to make it fit to drink. What is present in the water when it leaves the waterworks?

10. Chemistry of the environment  →  10.1. Water

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30

Sulfur dioxide, carbon monoxide and oxides of nitrogen are common gaseous pollutants found in the air. Which pollutants contribute to acid rain?

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

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31

Oxides of nitrogen, such as NO and NO2, are formed in the petrol engines of cars. They are removed from the exhaust gases by reactions in the car’s catalytic converter. Which row describes how oxides of nitrogen are formed in a petrol engine, and a reaction that happens in the catalytic converter?

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

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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32

Zinc is used to cover iron to prevent it from rusting. Why is zinc a suitable metal to use?

9. Metals  →  9.5. Corrosion of metals

9. Metals  →  9.3. Alloys and their properties

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33

Fertilisers are mixtures of different compounds used to increase the growth of crops. Which pair of substances contain the three essential elements for plant growth?

10. Chemistry of the environment  →  10.2. Fertilisers

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

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34

Which row describes the conditions used in the manufacture of sulfuric acid by the Contact process?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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35

Petroleum is an important raw material that is separated into useful products. Which terms describe petroleum and the method used to separate it?

11. Organic chemistry  →  11.3. Fuels

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

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36

Which statements about propene are correct?

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

11. Organic chemistry  →  11.4. Alkanes

11. Organic chemistry  →  11.3. Fuels

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37

Which row describes the production of ethanol and its properties?

11. Organic chemistry  →  11.6. Alcohols

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38

Ethanoic acid is a typical carboxylic acid. Which statement about 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

Which structure represents the ester made from ethanoic acid and propanol?

11. Organic chemistry  →  11.2. Naming organic compounds

11. Organic chemistry  →  11.7. Carboxylic acids

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40

The structure of a polymer is shown...

11. Organic chemistry  →  11.8. Polymers

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