Out of the following complex compounds, which of the compound will be having the minimum conductance

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Question

Out of the following complex compounds, which of the compound will be having the minimum conductance in solution?
(1) [Co(NH3)5Cl]Cl
(2) [Co(NH3)3Cl3]
(3) [Co(NH3)4Cl2]
(4) [Co(NH3)6]Cl3

Accepted Answer

Correct Answer: B and C — [Co(NH₃)₃Cl₃] and [Co(NH₃)₄Cl₂]Step-by-step Solution:Conductance depends on number of free ions produced in solution:[Co(NH₃)₆]Cl₃: → [Co(NH₃)₆]³⁺ + 3Cl⁻ = 4 ions → Highest conductance[Co(NH₃)₅Cl]Cl: → [Co(NH₃)₅Cl]²⁺ + Cl⁻ = 2 ions → moderate conductance[Co(NH₃)₃Cl₃]: All Cl⁻ inside coordination sphere → neutral, no ions → 0 conductance[Co(NH₃)₄Cl₂]: If neutral complex (both Cl inside sphere) → no ions → 0 conductanceBoth B and C are non-electrolytes with minimum (zero) conductance.Key Concepts:Werner's theory: Ligands inside the coordination sphere (inner sphere) are covalently bonded and do NOT ionise in solution. Only outer sphere ions dissociate freely.Conductance ∝ number of ions in solution. Non-electrolyte complexes → no ions → minimum conductance.Conductance order: 1:3 electrolyte > 1:1 electrolyte > non-electrolyte

Out of the following complex compounds, which of the compound will be having the minimum conductance in solution? (1) [Co(NH3)5Cl]Cl (2) [Co(NH3)3Cl3] (3) [Co(NH3)4Cl2] (4) [Co(NH3)6]Cl3

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Out of the following complex compounds, which of the compound will be having the minimum conductance in solution? (1) [Co(NH3)5Cl]Cl (2) [Co(NH3)3Cl3] (3) [Co(NH3)4Cl2] (4) [Co(NH3)6]Cl3

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