Gce Model Questions Vol1 2025 Chemistry Question 3

Practice essay / theory question 3 from the 2025 Gce Model Questions Vol1 Chemistry examination. This question covers Chemical Bonding, Molecular Geometry, Polarity, Ionic Compounds, Coordination Chemistry .

Gce Model Questions Vol1 2025 Chemistry Essay / Theory
Topics: Chemical Bonding Molecular Geometry Polarity Ionic Compounds Coordination Chemistry
Question 3 GCE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • essay
Gce Model Questions Vol1 2025 Chemistry Question 3 diagram

The labelled diagram shows three different chemical species: (A) carbon dioxide, CO₂, with a central carbon atom double‑bonded to two oxygen atoms. (B) sodium chloride, NaCl, represented as a Na⁺ cation adjacent to a Cl⁻ anion with a dotted ionic bond. (C) the octahedral complex ion [Fe(CN)₆]⁴⁻, where a central Fe atom is surrounded by six cyanide ligands (C≡N).

Question Parts

( a )
Identify the type of bond present in each of the three species (A), (B) and (C). State the bond order or nature for each bond you mention.
( b )
State the molecular geometry of each species and give a brief justification based on VSEPR or crystal‑field considerations.
( c )
Discuss the polarity of each species and the consequences for their physical properties (solubility, melting point, etc.).
( d )
For the complex ion [Fe(CN)₆]⁴⁻, determine the oxidation state of the central Fe atom and explain how the nature of the CN⁻ ligand influences the colour of the complex.

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About This Question

This is Gce Model Questions Vol1 2025 Chemistry Question 3. It is one of the essay questions from the 2025 Gce Model Questions Vol1 Chemistry examination.

The question covers Chemical Bonding, Molecular Geometry, Polarity, Ionic Compounds, Coordination Chemistry .

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