Lesson 15A.2
15A.2 Ligands, complex ions and coordination number Quiz: Pearson Edexcel Chemistry, Unit 15
20 questions
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Lesson 15A.2, Ligands, complex ions and coordination number: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 15: Transition Metals, written with Revision Ninja.
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The 20 questions
-
What is the definition of a ligand in complex ions?
- Electron-pair acceptor
- Lone-pair donor
- Proton acceptor
- Proton donor
-
What type of bond forms between a ligand and a central metal ion?
- Metallic bond
- Ionic bond
- Dative covalent bond
- Non-polar covalent bond
-
What term describes a central metal ion surrounded by coordinately bonded ligands?
- Free radical
- Complex ion
- Heterogeneous catalyst
- Chelate effect
-
What does the coordination number of a complex ion represent?
- Overall ion charge
- Total ligand count
- Oxidation state value
- Total dative bonds
-
How many dative bonds does a monodentate ligand form with a metal ion?
- Four
- Two
- Six
- One
-
Which compound acts as a bidentate ligand in transition metal complexes?
- Ammonia
- Chloride ion
- Ethane-1,2-diamine
- Water
-
What is the shape of a complex ion with a coordination number of six?
- Linear
- Tetrahedral
- Octahedral
- Square planar
-
What is the coordination number of the cobalt ion in [CoCl4]2-?
- 6
- 8
- 4
- 2
-
What is the coordination number of the copper ion in [Cu(NH3)4(H2O)2]2+?
- 2
- 6
- 8
- 4
-
What shape is usually formed by a complex ion containing four chloride ligands?
- Octahedral
- Tetrahedral
- Linear
- Square planar
-
What is the oxidation state of cobalt in [CoCl4]2-?
- +2
- +6
- +4
- -2
-
Which metal ion is present at the centre of a haemoglobin molecule?
- Iron(II)
- Cobalt(II)
- Iron(III)
- Copper(II)
-
What is the shape of the anticancer drug cisplatin?
- Octahedral
- Tetrahedral
- Square planar
- Trigonal bipyramidal
-
What thermodynamic factor makes multidentate ligands form more stable complexes?
- Negative enthalpy change
- Positive entropy change
- Positive enthalpy change
- Negative entropy change
-
What colour change occurs when excess chloride ions are added to aqueous cobalt(II) ions?
- Pink to blue
- Yellow to green
- Blue to pink
- Green to pink
-
Which species is a multidentate ligand with six donor atoms?
- Cl-
- H2O
- EDTA4-
- NH2CH2CH2NH2
-
Which term describes the increased stability of complexes containing multidentate ligands?
- Resonance effect
- Template effect
- Inductive effect
- Chelate effect
-
Why does replacing water ligands with chloride ligands reduce the coordination number?
- Chloride is smaller
- Chloride is larger
- Chloride is neutral
- Water is charged
-
What effect do ligands have on the d orbitals of a central transition metal ion?
- Split their energies
- Remove all electrons
- Fill them completely
- Increase their degeneracy
-
Which ligand in haemoglobin is replaced by carbon monoxide during poisoning?
- Oxygen
- Carbon dioxide
- Nitrogen
- Water
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