The $\mathrm{Eu}^{2+}$ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu = 63]

The addition of dilute NaOH to $\mathrm{Cr}^{3+}$ salt solution will give :

The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ________. (Nearest integer)

The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl5 is :

The nature of oxides $\mathrm{V}_2 \mathrm{O}_3$ and CrO is indexed as ' X ' and ' Y ' type respectively. The correct set of X...

Hydrogen peroxide reacts with iodine in basic medium to give :

In the given chemical reaction, colors of the $\mathrm{Fe}^{2+}$ and $\mathrm{Fe}^{3+}$ ions, are respectively $$ 5 \mathrm{Fe}^{2+}+\mathrm{MnO}_4^{-}+8 \mathrm{H}^{+} \rightarrow \mathrm{Mn}^{2+}+4 \mathrm{H}_2 \mathrm{O}+5 \mathrm{Fe}^{3+} $$

In the structure of the dichromate ion, there is a :

The lanthanide ion that would show color is