Coordination Compounds — Practice Quiz
ICSE · Class 12 · Chemistry
Try a 4-question quiz on Coordination Compounds for ICSE Class 12 Chemistry: tap an answer to check it and see why. 105 questions in the full chapter test.
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Quick Quiz: Coordination Compounds
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Which of the following is NOT a coordination compound?
The central metal ion in a coordination compound acts as:
What is the coordination number of Co in [Co(NH₃)₆]³⁺?
Which ligand is hexadentate?
Sample Questions
The IUPAC name of [Co(NH₃)₆]Cl₃ is:
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hexaamminecobalt(III) chloride
NH₃ = ammine (double m); × 6 = hexaammine; Co(III) = cobalt(III); counter ion Cl⁻ = chloride. Name: hexaamminecobalt(III) chloride. Note: 'ammine' not 'amine' — this is an IUPAC-specific spelling.
Which of the following is the correct name for K₃[Fe(CN)₆]?
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Potassium hexacyanidoferrate(III)
The complex is an anion [Fe(CN)₆]³⁻ → metal gets -ate suffix: Fe → ferrate. OS of Fe: x + 6(−1) = −3 → x = +3 → ferrate(III). Counter ion K⁺ = potassium. Name: potassium hexacyanidoferrate(III).
What is the oxidation state of Fe in K₄[Fe(CN)₆]?
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+2
OS of Fe: x + 6(−1) = −4 (charge of complex ion). x = −4 + 6 = +2. Fe is in +2 oxidation state. The compound is potassium hexacyanidoferrate(II).
In Werner's theory, primary valency corresponds to:
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Oxidation state
Werner's primary valency = oxidation state of the metal. It is ionisable and satisfied only by negative ions (counter ions). Secondary valency = coordination number.
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