(B) The correct answer is $(B)$.$Zn$ (Zinc) has a completely filled $d$-orbital $(3d^{10}4s^2)$ and does not exhibit variable oxidation states; it onl

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All elements of $3d$ series exhibit variable oxidation states.

(B) The correct answer is $(B)$.$Zn$ (Zinc) has a completely filled $d$-orbital $(3d^{10}4s^2)$ and does not exhibit variable oxidation states; it only shows a $+2$ oxidation state.

Class 12 Chemistry The d- and f-Block Elements General Characteristics

Medium

Which of the following statements is incorrect?

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A
Metals in highest oxidation states are more stable in oxides than in fluorides.
B
All elements of $3d$ series exhibit variable oxidation states.
C
In highest oxidation states,the transition metals show acidic character.
D
$Mn^{3+}$ and $Co^{3+}$ are oxidizing agents in aqueous solution.