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Question 1
- Question 1a
O-Level Paper 2
Q1a) The arrangement of particles in a solid metal and a solid ionic compound are shown in Fig 1.1.
Indigo (Chemical Bonding Notes)
- Question 1b & 1c
O-Level Paper 2
(Q1b) Explain why ionic compounds have high melting points.
(Q1c) Compare the electrical conductivity of a metal and an ionic compound. Use ideas about structure in your answer.
Indigo (Chemical Bonding Notes)
- Question 1d
O-Level Paper 2
(Q1d)(i) Fig. 1.2 shows the structure of a non-metal that conducts electricity. Identify this non-metal.
(Q1d)(ii) Explain, using Fig. 1.2, how this non-metal conducts electricity.
Indigo (Chemical Bonding Notes)
Question 2
- Question 2a
O-Level Paper 2
Nitrogen forms both ionic and covalent bonds.
The symbol for the nitride ion is N3–.
(Q2a)(i) Deduce the formula of calcium nitride.
(Q2a)(ii) State the charge on the nucleus of the N3– ion.
(Q2a)(iii) State the total number of electrons in the N3– ion.
(Q2a)(iv) Give the symbol of another negative ion with the same electronic configuration as N3–.
Indigo (Chemical Bonding Notes,
quick reference guide)
Question 3
- Question 3a
O-Level Paper 2
Some plastics contain condensation polymers.
(a)The partial structure of a condensation polymer can be represented as shown in Fig. 3.1.
(3a)(i) Name a condensation polymer with this structure.
(Q3a)(ii) Draw the structures of the two monomers used to make the polymer in Fig. 3.1.
Indigo (Organic Chemistry Notes)
- Question 3
O-Level Paper 2
(i) Complete Table 3.1 to show the molecular and empirical formulae of the two monomers form during depolymerisation.
(ii) Depolymerisation of the polymers in plastic is a method used to recycle plastics.
Describe two benefits of recycling plastics.
Indigo (Organic Chemistry Notes)
Question 4
- Question 4a & 4b
O-Level Paper 2
(Q4) Hydrocarbon molecules from crude oil are used in a series of reactions, as shown in Fig. 4.1.
(Q4a)(i) Cracking form smaller molecules from larger hydrocarbons molecules.
Explain why this is essential.
(Q4a)(ii) Identify a substance, other than alkenes, that is also made during cracking.
(Q4b) State the type of reaction that occurs in reaction A and state the conditions required.
Indigo (Organic Chemistry Notes)
Question 6
- Question 6a & 6b
O-Level Paper 2
(Q6) The relative atomic mass of chlorine is 35.5.
(Q6a) State the meaning of relative atomic mass.
(Q6b) The symbols for two isotopes of chlorine are shown.
(Q6b)(i) Explain, in terms of atomic structure, why two atoms of chlorine are isotopes.
(Q6b)(ii) Explain why the two isotopes of chlorine have identical chemical properties.
Indigo (June Booster Lesson,
Atomic Structure Revision)
Question 7
- Question 7b
O-Level Paper 2
(Q7b) The SMR and WGS reactions produce hydrogen fuel that does not cause environmental harm.
(Q7b)(i) Explain why both the SMR and WGS reactions are required to produce hydrogen fuel without causing environmental harm.
(Q7b)(ii) Explain why the hydrogen fuel produced does not cause environmental harm when combusted.
Indigo (Electrochemistry)
- Question 7e
O-Level Paper 2
(Q7e) Describe how the arrangement and movement of carbon dioxide molecules change when it is pressurised for storage.
Indigo (Kinetic Particle Theory)
Question 9
- Question 9d
O-Level Paper 2
(Q9d)(ii) In each reaction, hydrogen ions react with carbonate ions.
Construct an ionic equation for the reaction of hydrogen ions with carbonate ions.
Indigo (Acid and Bases Notes)
Question 10
- Question 10c
O-Level Paper 2
(Q10c) The student adds a lump of solid calcium carbonate to dilute sulfuric acid in order to prepare calcium sulfate.
The reaction stops after a few seconds and the percentage yield is very low.
(Q10c)(i) Explain why this happens.
(10c)(ii) Suggest a more suitable method and reagents to prepare calcium sulfate.
Explain your reasoning.
Indigo (Salt Preparation Notes)
