plumiAtoms, ions, compounds and formulae: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 1.1.1 Atoms, ions, compounds and formulae, 2019–2025, with mark schemes and examiner’s reports where available.
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All 17 questions on Atoms, ions, compounds and formulae, as a list
- January 2025, AS Unit 1, Q18 (1 mark): Which of these formulae are correct for the compound 1,4‑diethylcyclohexene? C10H18 C5H9 (i) (ii) (iii) skeletal formula molecular formula empirical formula A n
- January 2025, AS Unit 1, Q26(a) (1 mark): Give the name of the compound S2F10. (1)
- January 2025, Unit 5, Q20(b)(i) (1 mark): Deduce the simplest formula of this double salt. (1)
- October 2024, AS Unit 1, Q1 (1 mark): What is the molecular formula of naphthalene? A C10H8 B C10H10 C C12H10 D C12H12
- October 2024, AS Unit 1, Q2 (1 mark): Magnesium azide is an ionic compound containing the azide ion, N3 – . The empirical formula of magnesium azide is A Mg3N B MgN2 C MgN3 D MgN6
- October 2024, AS Unit 1, Q18(a) (3 marks): Give the molecular formula, empirical formula and IUPAC name for isooctane. (3) Molecular formula Empirical formula . IUPAC name .
- October 2024, Unit 5, Q19(a) (1 mark): Give the empirical formula of the raspberry ketone. (1)
- June 2024, AS Unit 2, Q20(b)(i) (2 marks): Show that myrcene and limonene are terpenes by comparing the molecular and/or empirical formulae of myrcene, limonene and isoprene. myrcene limonene isoprene (2
- January 2024, Unit 5, Q15(a)(i) (1 mark): Give the molecular formula of gingerol. (1)
- June 2023, AS Unit 3, Q1(a)(iii) (1 mark): Give the formula of A. (1)
- January 2023, Unit 5, Q19(c)(iii) (1 mark): Give the molecular formula of aspartame. (1)
- October 2022, AS Unit 1, Q17(a) (2 marks): Deduce the molecular formula of limonene. (2)
- January 2021, AS Unit 1, Q1 (1 mark): Which of these compounds has the same empirical and molecular formulae? A C2H4 B C3H8 C C4H10 D C5H10
- October 2020, AS Unit 1, Q1 (1 mark): What is the empirical formula of butane? A C4H10 B C2H5 C CH2.5 D CnH2n + 2
- October 2020, AS Unit 1, Q5 (1 mark): The formula of barium chloride is BaCl2. Which is correct for barium chloride? [ Ar values: Ba = 137.3 Cl = 35.5 ] A barium chloride exists as a molecule B bari
- October 2020, AS Unit 1, Q7 (1 mark): What is the molecular formula of the compound shown? O OH O OH A C2HO2 B C4H2O4 C C4H4O4 D C4H6O4
- January 2019, AS Unit 1, Q23(a) (1 mark): Give the empirical formula of 2-methylpropene. (1)
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