A) Cr
B) Fe
C) Mn
D) V
Correct Answer: C
Solution :
Each of the element in group IIIB to VIIB can show the maximum oxidation state equal to its group number. Mn shows maximum number of oxidation states on the basis of following electronic configuration \[_{25}Mn=1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}\,,3{{s}^{2}}3{{p}^{6}}\,3{{d}^{5}}\,,4{{s}^{2}}\,(+7)\]
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