plumiPolarisation of ions: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 3.A.3 Polarisation of ions, 2019–2025, with mark schemes and examiner’s reports where available.
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Open the full PDFYour answerQ20(e)
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Open the full PDFYour answerQ24(b)(iii)
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Open the full PDFYour answerQ12(f)
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Open the full PDFYour answerQ24(d)(i)
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All 14 questions on Polarisation of ions, as a list
- January 2025, AS Unit 1, Q12 (1 mark): Which cation would be the most polarising? Radius Charge A small large B small small C large small D large large
- October 2024, AS Unit 2, Q20(e) (6 marks): Compounds of lithium (Group 1) and compounds of magnesium (Group 2) have similar properties. Explain why: the ionic radii of Li+ and Mg2+ are similar • • the th
- January 2024, AS Unit 1, Q11 (1 mark): Which compound shows the greatest degree of polarisation? A sodium chloride B sodium iodide C magnesium chloride D magnesium iodide
- January 2023, AS Unit 1, Q24(b)(iii) (2 marks): Explain why the fluoride ion is difficult to polarise. (2)
- June 2022, AS Unit 1, Q10 (1 mark): Which row in the table shows the correct forces in a crystal of lithium iodide? Attractive forces Repulsive forces Some covalent between ions with between ions
- January 2022, AS Unit 1, Q5 (1 mark): Which properties of a cation result in the greatest polarising power? A large radius and large charge B large radius and small charge C small radius and small c
- January 2022, AS Unit 1, Q6 (1 mark): Which properties of an anion result in it being most easily polarised? A large radius and large charge B large radius and small charge C small radius and small
- October 2021, AS Unit 1, Q12(f) (3 marks): Explain why gaseous beryllium chloride and solid calcium chloride have different types of bonding. (3)
- June 2021, AS Unit 1, Q9 (1 mark): Which ion is the most polarisable? A Mg2+ B Ca2+ C Cl− D I−
- January 2021, AS Unit 1, Q10 (1 mark): Which of these ions has the greatest polarising power? A S2- B Cl- C K+ D Ca2+
- October 2020, AS Unit 1, Q16 (1 mark): Which pair of ions will form the compound with the most covalent character? A Li+ and I– B Na+ and Br– C K+ and Cl– D Rb+ and F–
- January 2020, AS Unit 1, Q9 (1 mark): Which of these compounds has the greatest covalent character? A MgF2 B MgI2 C BaF2 D BaI2 Use this space for any rough working. Anything you write in this space
- January 2019, AS Unit 1, Q10 (1 mark): Which ion has the greatest polarising power? A Cl− B Mg2+ C Na+ D S2−
- January 2019, AS Unit 1, Q24(d)(i) (2 marks): Explain why aluminium chloride in the solid state has significant covalent character. (2)
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