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STD 12 - 5. Co-ordination chemistry — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 5. Co-ordination chemistry4 Marks
MCQ
Which complex compound is most stable?
  • A
    $\left[ Co \left( NH _3\right)_6\right]_2\left( SO _4\right)_3$
  • B
    $\left[ Co \left( NH _3\right)_4\left( H _2 O \right) Br \right]\left( NO _3\right)_2$
  • C
    $\left[ Co \left( NH _3\right)_3\left( NO _3\right)_3\right]$
  • ✓
    $\left[ CoCl _2(\text { en })_2\right] NO _3$
✓

Answer

Correct option: D.
$\left[ CoCl _2(\text { en })_2\right] NO _3$
d
Chelating ligands in general form more stable complexes than their monodentate analogs

$\therefore$ The most stable complex is $\left[ CoCl _2( en )_2\right] NO _3$

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