Q30 / 160 · AP EAMCET 2018 (22 Apr Shift 1) · Chemistry
In lanthanide series, the element well known to exhibit +4 oxidation state is
- ALu
- Correct answerB$\mathrm{Ce}$
- C$\mathrm{Pm}$
- D$\mathrm{Nd}$
Solution
$$
\begin{aligned}
\mathrm{Ce}(58) & =[\mathrm{Xe}] 4 f^1 5 d^1 6 s^2 \\
\mathrm{Ce}^{+4} & =[\mathrm{Xe}] 4 f^0 5 d^0 6 s^0
\end{aligned}
$$
Cerium exihibit +4 oxidation state.
Hence, the correct answer is option: 'B'.