Identify the correct statements from the following. (i) $\mathrm{Eu}^{2+}$ and $\mathrm{Yb}^{2+}$ are…
Identify the correct statements from the following.
(i) $\mathrm{Eu}^{2+}$ and $\mathrm{Yb}^{2+}$ are reducing agents.
(ii) The electronic configuration of $\mathrm{Pr}^{3+}$ is $[\mathrm{Xe}] 4 f^3$.
(iii) Aqueous solution of $\mathrm{LaCl}_3$ is colourless.
(i), (ii), (iii)
(i), (iii)
(i), (ii)
(ii), (iii)
Solution
(a) $\mathrm{Eu}^{2+}$ and $\mathrm{Yb}^{2+}$ can lose electrons and form $\mathrm{Eu}^{3+}$ and $\mathrm{Yb}^{3+}$.
So, act as reducing agents.
(c) in the aqua solution of $\mathrm{LaCl}_3$ it forms colourless solution.