WorksheetsQuiz 1
Total questions: 14
Worksheet time: 7mins
The most common oxidation state of lanthanoids is-:
+4
+3
+6
+2
Which of the following elements belong to actinoid-:
Cerium
Lutetium
Thorium
Lanthanum
Lanthanoids are placed in -:
3rd group and 7th period
3rd group and 6th period
4rd group and 7th period
4rd group and 5th period
Which element among the lanthanoids has the smallest atomic radius ?
Ce
Lu
Eu
Gd
The general electronic configuration [Rn]5f1-14 6d0-1 7s2 is of -:
Lanthanoids
Actinoids
s- block elements
d-block elements
The general electronic configuration [Xn]4f1-14 5d0-1 6s2 is of-:
Lanthanoids
Actinoids
s- block elements
d-block elements
Which of the following lanthanide ions are stable in water?
Sm2+
Ce4+
Pr3
Tb4
Ion size of lanthanide is _____
Increase from La-Lu
Decrease from Lu-La
Decrease from La-Lu
Increase from Ac-Th
Which of the following is a correct term lanthanide elements can also be referred to as?
nonmetal
rare-earth metals
alkaline earth metal
halogen
In context of the lanthanoids, which of the following statements is not correct?
Availability of 4 f electrons results in the formation of compounds in +4 state for all the members of the series
There is a gradual decrease in the radii of the members with increasing atomic number in the series
All the members exhibit +3 oxidation state
Because of similar properties the separation of lanthanoids is not easy
Lanthanide contraction is caused due to
the appreciable shielding on outer electrons by 4f electrons from the nuclear charge
the appreciable shielding on outer electrons by 5d electrons from the nuclear charge
the same effective nuclear charge from Ce to Lu
the imperfect shielding on outer electrons by 4f electrons from the nuclear charge
Which of following elements are include in Lanthanoide series ?
La to Lu
Ce to Lu
La to yb
Ce to yb
Ce is an important member of Lanthenoid series which of following is wrong statement for Ce ?
The general oxidation state of Ce is +3 and +4.
+3 oxidation state of Ce is more stable than +4.
+4 oxidation state of Ce is not available in its aqueous solution.
Ce (IV) behave as oxidizing agent.
Which of following radioactive elements in Lanthanodies.
Promethium (Pm)
Lutetium (Lu)
Yetterbium (Yb
Samarium (Sm)
