- ACeO2
- BCe(OH)3
- CLu(OH)3$
- DTb(OH)3
Explanation:
Ceria or cerium oxide, CeO2, a lanthanide compound is used as a pigment and as a polishing agent for glass.
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$\begin{align}
\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,|| \\
H-O-C-C- \\
\end{matrix}\begin{matrix}
O\,\, \\
||\,\,\, \\
C{{H}_{2}}-C-O-H \\
\end{matrix} \\
p{{K}_{a}}=2.2\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,p{{K}_{a}}=3.98 \\
\end{align}$
$\begin{array}{*{20}{c}}{CHO}\\|\\{HCOH}\\|\\{HOCH}\\|\\{HCOH}\\|\\{C{H_2}OH}\\I\end{array}$ $\begin{array}{*{20}{c}}{CHO}\\|\\{HCOH}\\|\\{HCOH}\\|\\{HOCH}\\|\\{C{H_2}OH}\\{II}\end{array}$ $\begin{array}{*{20}{c}}{CHO}\\|\\{HCOH}\\|\\{HCOH}\\|\\{HCOH}\\|\\{C{H_2}OH}\\{III}\end{array}$