Question

Identify the correct decreasing order of thermodynamic stability of complexes from following.

विकल्प

• \[[\mathrm{Co(NH_{3})}_{6}]^{3+}>[\mathrm{Ag(CN)}_{2}]^{-}>[\mathrm{Cu(CN)}_{4}]^{2-}\]

• \[[\mathrm{Co(NH_3)_6}]^{3+}>[\mathrm{Cu(CN)_4}]^{2-}>[\mathrm{Ag(CN)_2}]^{-}\]

• \[[\mathrm{Cu(CN)}_{4}]^{2-}>[\mathrm{Ag(CN)}_{2}]^{-}>[\mathrm{Co(NH_{3})}_{6}]^{3+}\]

• \[[\mathrm{Ag(CN)}_2]^->[\mathrm{Cu(CN)}_4]^{2-}>[\mathrm{Co(NH_3)}_6]^{3+}\]

Answer 1

\[[\mathrm{Co(NH_3)_6}]^{3+}>[\mathrm{Cu(CN)_4}]^{2-}>[\mathrm{Ag(CN)_2}]^{-}\]

Explanation:

Higher the charge on the central metal ion, higher is the stability of the complex. The order of oxidation state of metal ions in the given complex is \[\mathrm{Co^{3+}>Cu^{2+}>Ag^{+}}\]