$Cu^+$ ion is not stable in aqueous solution, due to
$d^{10}$ configuration
disproportionation
less charge
pseudo inert gas configuration
The only cations present in a slightly acidic solutions are $Fe^{3+},\,Zn^{2+}$ and $Cu^{2+}$. The reagent that when added in excess to this solution would identify and separate $Fe^{3+}$ in one step is
Transition element makes complex compound due to
An oxide of copper which is red in colour has the formula
The number of $d-$ electrons in $F{e^{2 + }}$ (at no. of $Fe = 26$) is not equal to that of the
Which forms interstitial compounds?