A) \[S{{c}^{3+}},C{{o}^{2+}}\]
B) \[N{{i}^{2+}},C{{u}^{+}}\]
C) \[N{{i}^{2+}},T{{i}^{3+}}\]
D) \[S{{c}^{3+}},T{{i}^{3+}}\]
Correct Answer: C
Solution :
\[{{\,}_{28}}Ni=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{8}}4{{s}^{2}}\] \[N{{i}^{2+}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{8}}\] [2 unpaired electrons] \[_{22}Ti=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{2}}4{{s}^{2}}\] \[T{{i}^{3+}}=1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{1}}\] [1 unpaired electron] Hence, \[N{{i}^{2+}}\]and \[T{{i}^{3+}}\]are coloured in aqueous solution due to the presence of unpaired electrons in d-subshell.You need to login to perform this action.
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