EASY
Earn 100

Choose the incorrect statement among the following.

50% studentsanswered this correctly

Important Questions on The d- and f-Block Elements

MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Which of the following element has one electron in 5d-orbital in its electronic configuration?
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Among the lanthanide Eu, Tb, Er and Dy, which one readily forms stable divalent ions?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The Eu2+ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu=63 ]
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Gadolinium has a low value of third ionisation enthalpy because of
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
In the sixth period, the orbitals that are filled are :
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The 'f' orbitals are half and completely filled, respectively in lanthanide ions [Given : Atomic no. Eu,63:Sm,62:Tm,69;Tb,65;Yb,70;Dy,66]
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The number of 4f electrons in the ground state electronic configuration of Gd2+ is [Atomic number of Gd=64]
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The pair that has similar atomic radii is:
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The correct electronic configuration and spin-only magnetic moment (BM) of Gd3+(Z=64), respectively, are :
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Write down the electronic configuration of Pm3+.
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Which of the following elements have half-filled f-orbitals in their ground state ?
(Given : atomic number Sm-62;Eu=63;Tb=65;Gd=64,Pm=61)

Choose the correct answer from the options given below :

EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The elements in which electrons are progressively filled in 4f orbital are called
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Nd2+=______
MEDIUM
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The third ionization enthalpy is expected to be very low for
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The reason for greater range of oxidation states in actinoids is attributed to
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The highest possible oxidation states of uranium and plutonium, respectively, are
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
The maximum number of possible oxidation states of actinoids are shown by:
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Number of electrons present in 4f orbital of Ho3+ ion is ________ (Given Atomic No. of Ho=67)
HARD
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Write the general electronic configuration of lanthanoids. Why are most of the compounds of transition metals coloured?
EASY
Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids
Gadolinium belongs of 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?