MCQ
The diamagnetic species is
- A$[Co(H_2O)_6]^{2+}$
- B$[Ni(H_2O)_6)^{2+}$
- ✓$[Co(NH_3)_6]^{3+}$
- D$[Ni(NH_3)_6]^{2+}$
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$(i)\,\,N{O_2}\,\xrightarrow{{slow}}\,NO + O$
$(ii)\,\,{F_2} + O + NO\,\xrightarrow{{fast}}\,N{O_2}F + F$
$(iii)\,\,F + N{O_2}\,\xrightarrow{{fast}}\,N{O_2}F$
Select the correct one
$(I)\, [CrCl_2(NO_2)_2(NH_3)_2]^-$ $(II)\, [Co(NO_2)_3(NH_3)_3]$
$(III)\, [PtCl(NO_2)(NH_3 )(py)]$ $(IV)\, [PtBrCl(en)]$
$(I)\,\,\,-\,\,\,(II)\,\,\,-\,\,\,(III)\,\,\,-\,\,\,(IV)$

Reason : Dimerisation of benzoic acid.
$Cl_2 + 2e^-\to 2CI^{\Theta }$ ; $E^o = 1.36\, V$
$Mn^{+3} + e^-\to Mn^{+2}$ ; $E^o = 1.50\, V$
$Fe^{+3} + e^-\to Fe^{+2}$ ; $E^o = 0.77\, V$
Which of the following is a correct statement
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