A) \[S{{c}^{3+}}>C{{r}^{3+}}>F{{e}^{3+}}>M{{n}^{3+}}\] ionic radii
B) \[Sc<Ti<Cr<Mn\] Density
C) \[M{{n}^{2+}}>N{{i}^{2+}}<C{{o}^{2+}}<F{{e}^{2+}}\] ionic radii
D) \[FeO<CaO>MnO>CuO\] Basic nature
Correct Answer: A
Solution :
\[S{{c}^{3+}}>C{{r}^{3+}}>F{{e}^{3+}}>M{{n}^{3+}}\] the correct order is \[C{{r}^{+3}}>M{{n}^{+3}}>F{{e}^{+3}}>S{{c}^{+3}}\]
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