When excess of AgNO3 is added to a complex, one mole of AgCl is precipitated. The formula of complex is _____.

Q.1 (iv) When excess of AgNO₃ is added to a complex, one mole of AgCl is precipitated. The formula of complex is _____.

A. [CoCl₂(NH₃)₄]Cl

B. [CoCl(NH₃)₅]Cl₂

C. [CoCl₃(NH₃)₃]

D. [Co(NH₃)₆]Cl₃

Doubtly Asked 28 Oct 2026 Board exam · March 2025 hsc 12th Save WhatsApp Report

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Answer: A. [CoCl2(NH3)4]Cl

Answer: (a) [CoCl₂(NH₃)₄]Cl

Only chloride ions outside the coordination sphere (counter ions) are precipitated by AgNO₃. One mole of AgCl means one ionisable Cl⁻ per formula unit, which is true only for [CoCl₂(NH₃)₄]Cl. (b) would give 2 mol, (c) 0 mol and (d) 3 mol AgCl.

Doubtly AI · 28 Oct 2026 AI-generated · not yet verified Report

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When excess of AgNO3 is added to a complex, one mole of AgCl is precipitated. The formula of complex is _____.

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