Which of the following may be colourless
$C{r^{ + 3}}$
$C{u^ + }$
$F{e^{ + 3}}$
$C{u^{2 + }}$
The purple colour of $KMnO_4$ is due to the transition
In a transition series, as the atomic number increases, paramagnetism
A first row transition metal in its $+2$ oxidation state has a spin-only magnetic moment value of $3.86 \mathrm{BM}$ The atomic number of the metal is
Why does copper not replace hydrogen from acids ?
The magnetic moments of following,arranged in decreasing order will be :-
$(i)$ $Co^{3+}$ (Octahedral complex with a strong field ligand)
$(ii)$ $Co^{3+}$ (Octahedral complex with a weak field ligand like $F^-$ )
$(iii)$ $Co^{2+}$ (Tetrahedral complex)
$(iv)$ $Co^{2+}$ (Square planar complex)