MCQ
$Cu^+$ ion is not stable in aqueous solution, due to
- A$d^{10}$ configuration
- ✓disproportionation
- Cless charge
- Dpseudo inert gas configuration
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$A$. The chromate ion is square planar.
$B$. Dichromates are generally prepared from chromates.
$C$. The green manganate ion is diamagnetic.
$D$. Dark green coloured $\mathrm{K}_2 \mathrm{MnO}_4$ disproportionates in a neutral or acidic medium to give permanganate.
$E$. With increasing oxidation number of transition metal, ionic character of the oxides decreases.
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