A Level Chemistry Quizzes

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AQA quizzes

How the Periodic Table Works

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How the Periodic Table Works

Q1. Which of the following trends down a group is false? [1 mark]

1. Atomic number increases

2. Atomic radius increases

3. Electronegativity increases

4. Shielding increases

Answer:
3

Q2. Which of the following is a p block element? [1 mark]

A. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

B. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

C. 1s² 2s² 2p⁶ 3s² 3p⁵

D. 1s² 2s² 2p⁶ 3s²

Answer:
C

Q3. Which element is the most electronegative? [1 mark]

1. O

2. N

3. Cl

4. Se

Answer:
1. O

Q4. Which period 3 element has the smallest atomic radius? [1 mark]

1. Mg

2. Cl

3. Si

4. Al

Answer:
2. Cl

Q5. Which period 3 element has the lowest 1st ionisation energy? [1 mark]

1. P

2. S

3. Cl

4. Ar

Answer:
2. S

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Enthalpy and Enthalpy Change

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Enthalpy (H) and Enthalpy Change (ΔH)

Q1. Enthalpy (H) can be described as … [1 mark]

1. The kinetic energy stored within a chemical system

2. The heat energy stored outside a chemical system

3. The heat energy stored within a chemical system

4. The kinetic energy stored outside a chemical system

Answer:
3. The heat energy stored within a chemical system

Q2. All enthalpy change (ΔH) values are measured at standard temperature and pressure. These are: [1 mark]

1. 1 KPa & 298 K

2. 100 KPa & 298 ^oC

3. 100 KPa & 298 K

4. 1000 Pa & 298 K

Answer:
3. 100 KPa & 298 K

Q3. Which statement about enthalpy changes is false? [1 mark]

1. Exothermic reactions have a negative ΔH value

2. Endothermic reactions have a positive ΔH value

3. Energy is lost from a chemical system in exothermic reactions

4. Energy is lost from a chemical system in endothermic reactions

Answer:
4. Energy is lost from a chemical system in endothermic reactions

Q4. During an exothermic reaction … [1 mark]

1. Temperature increases

2. Energy is gained by the chemical system

3. There is no change in temperature

4. ΔH is a positive value

Answer:
1. Temperature increases

Q5. The ΔH for a reaction can be shown diagrammatically using … [1 mark]

1. A Maxwell-Boltzmann distribution curve

2. An energy profile diagram

3. Electrons in boxes

4. A Hess’ energy cycle

Answer:
2. An energy profile diagram

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Ions

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Ions

Q1. Which of the following statements is false? [1 mark]

1. Atoms gain electrons to become negative ions

2. Atoms lose electrons to become positive ions

3. Metals tend to form positive ions

4. Atoms can gain protons to become positive ions

Answer:
4. Atoms can gain protons to become positive ions

Q2. The most common charge on a group 2 ion is [1 mark]

1. 1+

2. 2+

3. 1-

4. 2-

Answer:
2. 2+

Q3. Which of the following ions would you not expect to exist? [1 mark]

1. Ca²⁺

2. F^2-

3. K⁺

4. O^2-

Answer:
2. F^2-

Q4. An S^2- ion contains [1 mark]

1. 16 protons & 18 electrons

2. 16 protons & 16 electrons

3. 16 protons & 14 electrons

4. 16 protons & 12 electrons

Answer:
1. 16 protons & 18 electrons

Q5. An Al³⁺ ion contains [1 mark]

1. 13 protons & 13 electrons

2. 16 protons & 13 electrons

3. 13 protons & 16 electrons

4. 13 protons & 10 electrons

Answer:
4. 13 protons & 10 electrons

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Hydrogen Bonding

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Hydrogen Bonding

Q1. Hydrogen bonding occurs between molecules when they contain a covalent bond between hydrogen and… [1 mark]

1. A metal

2. Any non-metal

3. A highly electronegative element

4. An element with a low atomic radius

Answer:
3. A highly electronegative element

Q2. Which of the following molecules would NOT show hydrogen bonding between them? [1 mark]

1. Hydrogen bromide, HBr

2. Hydrogen fluoride, HF

3. Water, H₂O

4. Ammonia, NH₃

Answer:
1. Hydrogen bromide, HBr

Q3. Which of the following molecules would show hydrogen bonding between them? [1 mark]

Molecule 1
Molecule 2
Molecule 3
Molecule 4

Answer:
4.

Q4. Which group of organic molecules do NOT show hydrogen bonding? [1 mark]

1. Alcohols

2. Carboxylic Acids

3. Amines

4. Haloalkanes

Answer:
4. Haloalkanes

Q5. When substances exhibit hydrogen bonding, they… [1 mark]

1. Have a much greater melting and boiling point than expected

2. Are likely to be soluble in water

3. Contain a highly electronegative element directly bonded to hydrogen

4. All of the above

Answer:
4. All of the above

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OCR quizzes

Characteristics of Transition Metals

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Characteristics of Transition Metals

Q1. Which is the best description of a transition metal? [1 mark]

1. Elements that have atoms and ions which have partially filled d orbitals

2. Elements that form one or more stable ions which have full d orbitals

3. Elements that form one or more stable ions which have partially filled p orbitals

4. Elements that form one or more stable ions which have partially filled d orbitals

Answer:
4. Elements that form one or more stable ions which have partially filled d orbitals

Q2. Which pair of elements are NOT considered transition elements? [1 mark]

1. Zn & Cu

2. Cr & Mn

3. Sc & Zn

4. Sc & Cu

Answer:
3. Sc & Zn

Q3. Which is the correct electronic structure for the Co²⁺ ion? [1 mark]

1. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷

2. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁰ 3d⁷

3. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁰ 3d⁵

4. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁰ 3d⁴

Answer:
2. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s⁰ 3d⁷

Q4. Which of the following statements about transition metals is false? [1 mark]

1. They are able to form complex ions with ligands

2. All their salts and complexes are white

3. They are able to have multiple stable oxidation states

4. They show catalytic activity

Answer:
2. All their salts and complexes are white

Q5. Vanadium is classified as a transition metal. This is because vanadium… [1 mark]

1. Is a d block element

2. Has incompletely filled d orbitals

3. Forms stable ions with incompletely filled d orbitals

4. Forms stable ions in which it has different oxidation states

Answer:
3. Forms stable ions with incompletely filled d orbitals

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Oxidation of Primary Alcohols

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Oxidation of Primary Alcohols

Q1. Which of the following is a known oxidising agent? [1 mark]

1. H⁺ / V₂O₅^–

2. H⁺ / MnO₄^–

3. H⁺ / CrO₄^2-

4. H⁺ / Cu₂O₃^2-

Answer:
2. H⁺ / MnO₄^–

Q2. Which shorthand represents “oxidation” in an equation? [1 mark]

1. [O]

2. [H]

3. [Ox]

4. [H⁺]

Answer:
1. [O]

Q3. Acidified potassium dichromate was used to oxidise propan-1-ol to propanoic acid.
What colour change would you expect to observe during the process? [1 mark]

1. Purple to Green

2. Purple to Colourless

3. Orange to Green

4. Green to Orange

Answer:
3. Orange to Green

Q4. When oxidising butan-1-ol to butanal, which apparatus should be used? [1 mark]

1. Reflux

2. Distillation

3. Filtration

4. Titration

Answer:
2. Distillation

Q5. The carboxylic acid shown was produced by the oxidation of an alcohol.
Which alcohol was used in the process? [1 mark]

1. Butan-1,4-diol

2. Propan-1,3-diol

3. 2-methylpropan-1,2-diol

4. 2-methylpropan-1,3-diol

Answer:
4. 2-methylpropan-1,3-diol

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Carbon Chemistry

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Carbon Chemistry

Q1. What is the maximum number of single covalent bonds that a carbon atom can form? [1 mark]

1. Two

2. Three

3. Four

4. Five

Answer:
3. Four

Q2. When carbon forms a single covalent bond, it is known as … [1 mark]

1. A pi bond

2. An omega bond

3. A sigma bond

4. An alpha bond

Answer:
3. A sigma bond

Q3. A covalent bond is formed from the overlap between … [1 mark]

1. Two nuclei

2. An electron orbital and a nucleus

3. Three electron orbitals

4. Two electron orbitals

Answer:
4. Two electron orbitals

Q4. A sigma bond can be formed by the overlap of … [1 mark]

1. Two s orbitals

2. An s orbital and a p orbital

3. Two p orbitals

4. All of the above

Answer:
4. All of the above

Q5. Which of the following statements about single covalent bonds is false? [1 mark]

1. They contain a pair of electrons

2. They are fixed in position / no rotation

3. They are very strong

4. They exist directly between the two nuclei of the atoms involved

Answer:
2. They are fixed in position / no rotation

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Edexcel quizzes

Key Terms in Organic Chemistry

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Key Terms in Organic Chemistry

Q1. Which of the following statements about aliphatic organic molecules is false? [1 mark]

1. They can exist as straight chains

2. They contain delocalised electrons

3. They can exist as branched molecules

4. They can exist as cyclical molecules

Answer:
2. They contain delocalised electrons

Q2. Which of the following terms describes a cyclical organic molecule that contains delocalised electrons? [1 mark]

1. Aliphatic

2. Alicyclic

3. Aromatic

4. Arocyclic

Answer:
3. Aromatic

Q3. Which of the following groups is not considered a “functional” group? [1 mark]

1. C-H

2. O-H

3. C-Cl

4. C=C

Answer:
1. C-H

Q4. A series of organic molecules that have the same general formula is known as …. [1 mark]

1. A heterologous series

2. An isomeric series

3. A functional series

4. A homologous series

Answer:
4. A homologous series

Q5. Which is the most accurate definition of “isomers”? [1 mark]

1. Organic compounds that have the same structural formula, but a different general formula

2. Organic compounds that have the same general formula, but a different structural formula

3. Organic compounds that have the same molecular formula, but a different structural formula

4. Organic compounds that have the same skeletal formula, but different functional groups

Answer:
3. Organic compounds that have the same molecular formula, but a different structural formula

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The Covalent Bond

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The Covalent Bond

Q1. Which is the most correct definition of a covalent bond? [1 mark]

1. Two atoms with overlapping orbitals in which electrons are shared

2. Two atoms with overlapping nuclei in which a pair of electrons is shared

3. Two atoms with overlapping orbitals in which a pair of electrons is shared

4. Two atoms with overlapping orbitals in which a pair of electrons is donated by one atom

Answer:
3. Two atoms with overlapping orbitals in which a pair of electrons is shared

Q2. True or False.
The pair of electrons in a covalent bond spin in the same direction [1 mark]

Answer:
False

Q3. Which of the following statements is correct? [1 mark]

1. Shared electrons stay fixed in the overlap between orbitals

2. The overlap creates an area of high electron density

3. The overlap causes ions to form

4. The overlap can only occur between atoms of the same element

Answer:
2. The overlap creates an area of high electron density

Q4. Which of the following is NOT a covalent structure? [1 mark]

1. NO₂

2. C_(graphite)

3. H₂

4. NaI

Answer:
4. NaI

Q5. How many electrons would each atom donate in a triple covalent bond? [1 mark]

1. 2

2. 3

3. 4

4. 6

Answer:
2. 3

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REDOX Equations

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REDOX Equations

Q1. What has been oxidised in the following equation? [1 mark]

SO₂ + O₂ → 2SO₃

1. S

2. O

3. SO₂

4. O₂

Answer:
1. S

Q2. Identify the element that has been reduced in the following equation. [1 mark]

2FeCl₃ + H₂ → 2FeCl₂ + 2HCl

1. Fe

2. Cl

3. H

4. H₂

Answer:
1. Fe

Q3. Which of the following is a REDOX reaction? [1 mark]

1. Ca + 2H₂O → Ca(OH)₂ + H₂

2. MgO + H₂O → Mg(OH)₂

3. NaCl + AgNO₃ → AgCl + NaNO₃

4. Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O

Answer:
1. Ca + 2H₂O → Ca(OH)₂ + H₂

Q4. In which of the following reactions is sulfuric (IV) acid (H₂SO₃) acting as an oxidising agent? [1 mark]

1. 2NaOH + H₂SO₃ → Na₂SO₃ + 2H₂O

2. 2FeCl₃ + H₂SO₃ + H₂O → 2FeCl₂ + H₂SO₄ + HCl

3. 2H₂S + H₂SO₃ → 3H₂O + 3S

4. H₂SO₃ → H₂O + SO₂

Answer:
3. 2H₂S + H₂SO₃ → 3H₂O + 3S

Q5. Which of the following is NOT a disproportionation reaction? [1 mark]

1. Cl₂ + OH^– → Cl^– + ClO^– + H₂O

2. Cu₂O + H₂SO₄ → CuSO₄ + CuSO₄ + Cu + H₂O

3. 3IO^– → 2I^– + IO₃^–

4. Cu + 4HNO₃ → Cu(NO₃)₂ + 2H₂O + 2NO₂

Answer:
4. Cu + 4HNO₃ → Cu(NO₃)₂ + 2H₂O + 2NO₂

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