Verified Solution • 2025–26 Session moderate

QJEEM03Ch01ba: JEE Main 2003 Chemistry - Class 12 JEEM03Ch01ba Solution: One mole of the complex compound Co(NH 3 ) 5 Cl 3 , gives 3…

One mole of the complex compound Co(NH3)5Cl3, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO3 solution to yield two moles of AgCl (s). The structure of the complex is :

Multiple Choice Options

  • A [Co(NH3)3Cl3]. 2NH3
  • B [Co(NH3)4Cl2] Cl. NH3
  • C [Co(NH3)4Cl] Cl2. NH3
  • D [Co(NH3)5Cl] Cl2

Step-by-Step Verified Solution

Co (NH3)5Cl3  ⇋  [Co(NH3)5Cl]+2+2Cl−Co\,{\left( {N{H_3}} \right)_5}C{l_3}\,\,\leftrightharpoons\,\,{\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \right]^{ + 2}} + 2C{l^ - }

∴\therefore     \,\,\,\, Structure is    [Co(NH3)5Cl]Cl2\,\,\,\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \right]C{l_2}

Now    [Co(NH3)5Cl]Cl2+2AgNO3\,\,\,\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \right]C{l_2} + 2AgN{O_3}

→   [Co(NH3)5Cl](NO3)2+2AgCl\to \,\,\,\left[ {Co{{\left( {N{H_3}} \right)}_5}Cl} \right]{\left( {N{O_3}} \right)_2} + 2AgCl

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