MCQ
The most important oxidation state of copper is
- A$1$
- ✓$2$
- C$3$
- D$4$
$C{u^{ + 1}} + {e^ - } \to Cu$; ${E^0} = + 0.52\,V$
$C{u^{ + 2}} + 2{e^ - } \to Cu$; ${E^0} = + 0.34\,V$
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(Given atomic number: $\mathrm{Sc}: 21, \mathrm{Ti}: 22, \mathrm{~V}: 23$, $\mathrm{Cr}: 24, \mathrm{Mn}: 25, \mathrm{Fe}: 26, \mathrm{Co}: 27, \mathrm{Ni}: 28, \mathrm{Cu}: 29$, $\mathrm{Zn}: 30)$