Transitions And Inner-Transition Elements Test.

The most common oxidation state of lanthanoids is-:

• +4

• +3

• +6

• +2

Which of the following elements belong to actinoid-:

• Cerium

• Lutetium

• Thorium

• Lanthanum

Which element among the lanthanoids has the smallest atomic radius ?

• Ce

• Lu

• Eu

• Gd

Lanthanoids are placed in -:

• 3^rd group and 7^th period

• 3^rd group and 6^th period

• 4^rd group and 7^th period

• 4rd group and 5th period

The general electronic configuration [Rn]5f^1-14 6d^0-1 7s² is of -:

• Lanthanoids

• Actinoids

• s- block elements

• d-block elements

An atom with atomic number 21 belongs to category of-:

• s- block elements

• p-block elements

• d-block elements

• f-block elements

The number of unpaired d electrons retained in Fe⁺² (Z= 26) ion is -:

• 3

• 4

• 5

• 6

The group which belongs to transition series is -:

• 2

• 7

• 13

• 15

d-d transition is possible only in-:

• Cu⁺¹

• Cu⁺²

• Zn⁺²

• Zn

The general electronic configuration [Xn]4f^1-14 5d^0-1 6s² is of-:

• Lanthanoids

• Actinoids

• s- block elements

• d-block elements