A) \[{{K}_{2}}[NiC{{l}_{4}}]\]exists while \[{{K}_{2}}[PtC{{l}_{4}}]\] is unknown.
B) \[{{K}_{2}}[NiC{{l}_{6}}]\] exists while \[{{K}_{2}}[PtC{{l}_{6}}]\] is unknown.
C) \[I{{E}_{3}}\]of \[Mn\] is higher than that of\[Fe\].
D) Transition metal Scandium \[(Sc,\,Z=21)\] does not show variable oxidation state.
Correct Answer: B
Solution :
[b] (1) CORRECT statement:-It is reverse. IE explains about relative stabilities of various oxidation state. For example \[N{{i}^{2+}}\] compounds are more stable than \[P{{t}^{2+}}\]compounds, e.g.,\[I{{E}_{1}}+I{{E}_{2}}(kJ\,mo{{l}^{-1}})\] | ||
\[Ni\] | \[2.49\] | Smaller the \[(I{{E}_{1}}+I{{E}_{2}})\]of the metal more stable is its compound. \[\therefore \] Stability \[N{{i}^{2+}}>P{{t}^{2+}}\] |
\[Pt\] |
\[I{{E}_{3}}+I{{E}_{4}}\] \[(kJmo{{l}^{-1}})\] | \[I{{E}_{1}}+I{{E}_{2}}+I{{E}_{3}}+I{{E}_{4}}\] \[(kJ\,mo{{l}^{-1}})\] | |
\[Ni\] | \[8.80\] | \[11.29\] |
\[Pt\] | \[6.70\] | \[9.36\] |
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