Question:
Which from following compounds contains complex cations and anions?
Which from following compounds contains complex cations and anions?
Show Hint
Look for a compound in which the cation is a coordination complex and the counter ion is separate.
Updated On: Nov 13, 2026
- Tetraamminecopper(II)ion
- Triamminetrinitrocobalt(III)
- Tetraamminedibromoplatinum(IV) bromide
- Sodium hexafluoroaluminate(III)
Show Solution
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Ionisation of a coordination compound gives a complex ion and counter ions. We look for a compound with a complex cation.
Step 2: Check the Options
Tetraamminecopper(II) ion is only a single complex ion.
Triamminetrinitrocobalt(III) is a neutral complex.
Sodium hexafluoroaluminate(III) has a simple \( \text{Na}^+ \) cation and a complex anion.
Step 3: Option C
\( [\text{Pt}(\text{NH}_3)_4\text{Br}_2]\text{Br}_2 \) ionises to the complex cation \( [\text{Pt}(\text{NH}_3)_4\text{Br}_2]^{2+} \) and two bromide anions.
Step 4: Compare the options
Option (C) is the only one with a complex cation and a separate anion.
Final Answer:
Tetraamminedibromoplatinum(IV) bromide has a complex cation with bromide anions. \[ \boxed{\text{(C) }\text{Tetraamminedibromoplatinum(IV) bromide}} \]
Ionisation of a coordination compound gives a complex ion and counter ions. We look for a compound with a complex cation.
Step 2: Check the Options
Tetraamminecopper(II) ion is only a single complex ion.
Triamminetrinitrocobalt(III) is a neutral complex.
Sodium hexafluoroaluminate(III) has a simple \( \text{Na}^+ \) cation and a complex anion.
Step 3: Option C
\( [\text{Pt}(\text{NH}_3)_4\text{Br}_2]\text{Br}_2 \) ionises to the complex cation \( [\text{Pt}(\text{NH}_3)_4\text{Br}_2]^{2+} \) and two bromide anions.
Step 4: Compare the options
Option (C) is the only one with a complex cation and a separate anion.
Final Answer:
Tetraamminedibromoplatinum(IV) bromide has a complex cation with bromide anions. \[ \boxed{\text{(C) }\text{Tetraamminedibromoplatinum(IV) bromide}} \]
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