Choose the correct statement. $Fe^{3+}$ ion is more stable than $Fe^{2+}$ ion because
- AMore the charge on the atom,more is its stability
- BConfiguration of $Fe^{2+}$ is $3d^6$ while $Fe^{3+}$ is $3d^5$
- C$Fe^{2+}$ has a larger size than that of $Fe^{3+}$
- D$Fe^{3+}$ ions are coloured
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Aspects Metal $a$. The metal which reveals a maximum number of oxidation states $i$. Scandium $b$. The metal although placed in $3d$ block is considered not as a transition element $ii$. Copper $c$. The metal which does not exhibit variable oxidation states $iii$. Manganese $d$. The metal which in $+1$ oxidation state in aqueous solution undergoes disproportionation $iv$. Zinc
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| $a$. The metal which reveals a maximum number of oxidation states | $i$. Scandium |
| $b$. The metal although placed in $3d$ block is considered not as a transition element | $ii$. Copper |
| $c$. The metal which does not exhibit variable oxidation states | $iii$. Manganese |
| $d$. The metal which in $+1$ oxidation state in aqueous solution undergoes disproportionation | $iv$. Zinc |
Select the correct option.
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