JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Larger number of oxidation states are exhibited by the actinoides than those by the lanthanoides, the main reason being

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Correct option: B

Lesser energy difference between 5

f

and 6

d

than between 4

f

and 5

d

-orbitals

Option B is correct because the smaller energy difference between 5f and 6d orbitals in actinides allows for more unpaired electrons and thus more oxidation states.

More Questions from d & f- BLOCK ELEMENTS

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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}

and

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

is called