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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Remembering +4 | -1

In haemoglobin the iron shows oxidation state :

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Correct option: B

+ 3

Option A (+2) is the correct oxidation state of iron in hemoglobin when it is in the ferrous form (Fe²⁺), which is capable of binding oxygen.

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Mercury is transported in metal containers made of: Cadmipone is a mixture of: The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu Statement-I:

{Sm}^{3+}

{Dy}^{3+}

have same colour (yellow).

Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of

\mathrm{Ti}{\mathrm{O}_2}

\mathrm{BaS}{\mathrm{O}_4}