IGCSE Co-ordinated Sciences (9–1) 0973 · Chemistry · 21

0654.C2.5.01 — State that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations: past paper questions

8 real questionsasked in 5 of the last 10 exam series2020–2026usually: State, Name

Real questions on 0654.c2.5.01 — state that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations

The newest 8 of 8 written questions. Open one to see it on the real paper.

0973/31 · May/June 2026 · Q6b[1]
State the type of chemical bonding in a molecule of methane.
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0973/31 · October/November 2025 · Q8b(i)[2]
Carbon dioxide is one of the products of the reaction. State the names of the other two products of the reaction.
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0973/31 · October/November 2025 · Q8b(ii)[1]
1.00 g of calcium carbonate makes 240 cm of carbon dioxide gas at room temperature and pressure. mass of calcium carbonate = g Calculate the mass of calcium carbonate needed to make 360 cm 3 of carbon dioxide gas at room temperature and pressure.
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0973/31 · May/June 2023 · Q8a(ii)[2]
State the name of the type of chemical bonding present in a molecule of methane. Explain your answer. type of chemical bonding explanation
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0973/32 · May/June 2023 · Q5c(iv)[1]
Name the type of chemical bonding in a molecule of water.
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0973/32 · May/June 2022 · Q8b[2]
State the type of bond made when chlorine reacts with hydrogen to make the gas hydrogen chloride, HCl. Explain your answer. type of bond explanation
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0973/31 · October/November 2021 · Q2c(iii)[1]
State why the bonding between the carbon atoms in diamond is covalent and not ionic.
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0973/32 · May/June 2020 · Q8c[1]
Fig. 8.2 is a dot-and-cross diagram of a water molecule. O X X H H Fig. 8.2 State the type of chemical bonding in a water molecule.
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What examiners said

Many candidates correctly determined that it was covalent bonding and most were able to explain why. A few candidates confused covalent and ionic bonding and a few referred to single and double bonding.
— Examiner report, May/June 2023, 0973/31 Q8(a)(ii) (Cambridge)

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In the syllabus

21 0654.C2.5.01 — State that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations

State that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations
Describe the formation of covalent bonds 4 Describe the formation of covalent bonds in in simple molecules, including H2, Cl 2, simple molecules, including CH3OH, C2H4, H2O, CH4, NH3 and HCl. Use dot-and- O2, CO2 and N2. Use dot-and-cross diagrams cross diagrams to show the electronic to show the electronic configurations in these configurations in these molecules molecules
Describe in terms of structure and bonding 5 Explain in terms of structure and bonding the the properties of simple molecular properties of simple molecular compounds: compounds: (a). low melting points and boiling points (a). low melting points and boiling points in terms of weak intermolecular forces (b). poor electrical conductivity (specific types of intermolecular forces are not required) (b). poor electrical conductivity

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