d and f Block Elements — JEE Main PYQs

The outer electron configuration of Gd (Atomic No : 64 is :

The correct order of $E_{{\mathrm{M}}^{2+}/\mathrm{M}}^0$ values with negative sign for the four successive elements $\mathrm{Cr}$, $\mathrm{Mn}$, $\mathrm{Fe}$ and Co is

Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements in incorrect ?

In context with the transition elements, which of the following statements is incorrect ?
(1) In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.
(2) In the highest oxidation states, the transition metal show basic ch …

Larger number of oxidation states are exhibited by the actinoids than those by the lanthanoids, the main reason being

Identify the incorrect statement among the following

The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because

The "spin-only" magnetic moment [in units of Bohr magneton, $({\mu }_{\mathrm{B}})$] of ${\mathrm{Ni}}^{2+}$ in aqueous solution would be (Atomic number of Ni = 28)

Lanthanoid contraction is caused due to

The lanthanide contraction is responsible for the fact that

The value of the 'spin only' magnetic moment for one of the following configurations is 2.84 BM. The correct one is

Which of the following factors may be regarded as the main cause of lanthanide contraction?

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?

Cerium $(Z=58)$ is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?

The correct order of magnetic moments (spin only values in B.M.) among is
(Atomic numbers: $\mathrm{Mn}=25$; $\mathrm{Fe}=26$, $\mathrm{Co}=27$)