Which of the following metal shows the highest oxidation state?

Chromium

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Manganese

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Vanadium

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Iron

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Solution

The correct option is B Manganese
Elements Outer electronic configuration Oxidation states
Sc $3 d^{1} 4 s^{2}$ +2, +3
Ti $3 d^{3} 4 s^{2}$ +2, +3, +4
V $3 d^{3} 4 s^{2}$ +2, +3, +4, +5
Cr $3 d^{5} 4 s^{1}$ +2, +3, +4, +5, +6
Mn $3 d^{5} 4 s^{2}$ +2, +3, +4, +5, +6, +7
Fe $3 d^{6} 4 s^{2}$ +2, +3, +4, +5, +6
Co $3 d^{7} 4 s^{2}$ +2, +3, +4
Ni $3 d^{8} 4 s^{2}$ +2, +3, +4
Cu $3 d^{10} 4 s^{1}$ +1, +2
Zn $3 d^{10} 4 s^{2}$ +2
Manganese shows the highest oxidation state $+ 7$

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Elements	Outer electronic configuration	Oxidation states
Sc	$3 d^{1} 4 s^{2}$	+2, +3
Ti	$3 d^{3} 4 s^{2}$	+2, +3, +4
V	$3 d^{3} 4 s^{2}$	+2, +3, +4, +5
Cr	$3 d^{5} 4 s^{1}$	+2, +3, +4, +5, +6
Mn	$3 d^{5} 4 s^{2}$	+2, +3, +4, +5, +6, +7
Fe	$3 d^{6} 4 s^{2}$	+2, +3, +4, +5, +6
Co	$3 d^{7} 4 s^{2}$	+2, +3, +4
Ni	$3 d^{8} 4 s^{2}$	+2, +3, +4
Cu	$3 d^{10} 4 s^{1}$	+1, +2
Zn	$3 d^{10} 4 s^{2}$	+2