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1

A student makes aqueous copper(sulfate. The student adds an excess of copper(oxide powder to warm sulfuric acid and stirs the mixture. Which apparatus should be used to separate aqueous copper(sulfate from the excess copper(oxide?

4. Electrochemistry  →  4.1. Electrolysis

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

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2

A student follows the rate of the reaction between marble chips, CaCO3, and dilute hydrochloric acid. CaCO3 + 2HCl  CaCl 2 + CO2 + H2O Which diagrams show apparatus that, with a stopwatch, is suitable for this experiment?

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

6. Chemical reactions  →  6.2. Rate of reaction

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3

A mixture of three liquids is separated by fractional distillation. Which statements are correct?

11. Organic chemistry  →  11.3. Fuels

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

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4

A mixture of four coloured dyes is analysed by chromatography. The result is shown...

12. Experimental techniques and chemical analysis  →  12.3. Chromatography

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5

A compound X, when heated with an aqueous solution of compound Y, produces a gas that turns red litmus blue. Y could be potassium hydroxide. X is an acid. X could be an ammonium salt. X could be sodium nitrate. Which statements are correct?

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

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

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6

An aqueous solution of zinc chloride is tested by adding reagents. Which observation is correct?

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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7

The rate of diffusion of carbon dioxide and methane is investigated at two different temperatures, one high and one low. Which row correctly shows the gas that diffuses faster and the temperature at which diffusion takes place most rapidly?

1. States of matter  →  1.2. Diffusion

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

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8

Which statement about atoms and ions is correct?

2. Atoms, elements and compounds  →  2.3. Isotopes

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

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9

The bonding in a molecule of carbon dioxide can be represented by a dot-and-cross diagram. Which diagram is correct?

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

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

11. Organic chemistry  →  11.5. Alkenes

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10

Which statement about the structure or bonding of metals is correct?

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

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

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11

The relative atomic mass of chlorine is 35.5. What is the mass of 2.0 mol of chlorine gas?

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

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

2. Atoms, elements and compounds  →  2.3. Isotopes

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12

Methane burns in oxygen. CH4+ 2O2 CO2+ 2H2O10 cm3 of methane is reacted with 25 cm3 of oxygen. What is the total volume of gas that would be measured after the reaction?

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

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

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13

An aqueous solution is made by dissolving 3.4 g of sodium hydroxide, NaOH, to make 500 cm3 of solution. What is the concentration, in mol / dm3, of this sodium hydroxide solution?

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

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

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14

Which statement about electrolysis reactions is correct?

4. Electrochemistry  →  4.1. Electrolysis

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15

The apparatus shown...

4. Electrochemistry  →  4.1. Electrolysis

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16

Which process is endothermic?

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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17

The reaction of hydrogen with chlorine to form gaseous hydrogen chloride is exothermic. Which statement is correct?

5. Chemical energetics  →  5.1. Exothermic and endothermic reactions

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18

The equation shows the reaction for the manufacture of ammonia. N2+ 3H22NH3Which change will decrease the activation energy of the reaction?

6. Chemical reactions  →  6.2. Rate of reaction

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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19

Which statements about oxidation and reduction are correct?

6. Chemical reactions  →  6.4. Redox

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20

Aqueous ammonium nitrite, NH4NO2, decomposes when heated. NH4NO2 N2+ 2H2OIn this salt, the anion is 1 . The nitrogen atoms in the 2 ion are oxidised during the reaction. Which formulae correctly complete gaps 1 and 2?

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

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

6. Chemical reactions  →  6.4. Redox

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21

Elements X and Y react together in a reversible reaction to form XY2. X + 2Y XY2 1.0 mol of X is mixed with 1.0 mol of Y and the mixture is left to react until an equilibrium position is reached. Which statements about this reaction are correct?

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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22

Two solutions are prepared. ● Solution P is 0.050 mol / dm3 hydrochloric acid. ● Solution Q is 0.100 mol / dm3 butanoic acid. A 2 cm strip of magnesium ribbon is put into 100 cm3 of each solution. Fizzing is seen in both solutions but the fizzing is faster in solution P than it is in solution Q. Which statement helps to explain this observation?

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

9. Metals  →  9.4. Reactivity series

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23

Which compound can be formed by precipitation?

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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24

In a neutralisation reaction, which change in particles occurs?

6. Chemical reactions  →  6.2. Rate of reaction

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

11. Organic chemistry  →  11.4. Alkanes

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25

In order to decide which would be the better nitrogenous fertiliser, a student calculates the percentage by mass of nitrogen in both ammonium sulfate and ammonium nitrate. Which row gives the correct results?

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

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

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26

The manufacture of sulfuric acid by the Contact process involves the use of three different raw materials. How many of these raw materials are elements, how many are compounds and how many are mixtures?

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

6. Chemical reactions  →  6.3. Reversible reactions and equilibrium

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27

The diagram shows part of the Periodic Table. W X Y Z Which two letters represent elements that can react together to form covalent compounds?

8. The Periodic Table  →  8.1. Arrangement of elements

3. Stoichiometry  →  3.1. Formulae

8. The Periodic Table  →  8.4. Transition elements

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28

Which statement about elements in 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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29

Which statement about the properties of the elements in Group VIII of the Periodic Table, helium to xenon, 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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30

Which two statements indicate that metal M may have a proton number between 21 and 30?

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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31

Different metals react with water in different ways. Which statement is correct?

9. Metals  →  9.4. Reactivity series

9. Metals  →  9.1. Properties of metals

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32

Metal X is more reactive than zinc but less reactive than sodium. What would be the best method for obtaining metal X from its ore?

9. Metals  →  9.6. Extraction of metals

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33

Steel is often galvanised. Which statements about galvanising are correct?

9. Metals  →  9.5. Corrosion of metals

9. Metals  →  9.3. Alloys and their properties

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34

In the extraction of aluminium from aluminium oxide, the following three reactions take place. Al 3+ + 3e–  Al 2O2–  O2 + 4e– C + O2  CO2 Which reactions take place at the positive electrode?

9. Metals  →  9.6. Extraction of metals

9. Metals  →  9.4. Reactivity series

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35

The carbon cycle regulates the amount of carbon dioxide in the atmosphere. Combustion, photosynthesis and respiration are involved in this cycle. How do these processes affect the amount of carbon dioxide in the atmosphere?

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

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36

Which statement about alkanes is correct?

11. Organic chemistry  →  11.4. Alkanes

11. Organic chemistry  →  11.5. Alkenes

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37

The structure of compound X is shown...

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

11. Organic chemistry  →  11.3. Fuels

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38

When ethene reacts with steam to form ethanol, which type of reaction takes place?

11. Organic chemistry  →  11.6. Alcohols

11. Organic chemistry  →  11.5. Alkenes

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39

Which compound could be a flavouring in a non-alcoholic fruit drink?

11. Organic chemistry  →  11.2. Naming organic compounds

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

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40

P is a polymer that: ● has six carbon atoms in each of the monomers from which it is formed ● is not a polyester ● is formed using condensation polymerisation. What is the partial structure of P?

11. Organic chemistry  →  11.8. Polymers

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