Which of the following ions has the least magnetic moment
$C{u^{ + 2}}$
$N{i^{ + 2}}$
$C{o^{ + 3}}$
$F{e^{ + 2}}$
$F{e^{2 + }}$ shows
While filling up of electrons in the atomic orbitals, the $4 s$ orbital is filled before the $3 d$ orbital but reverse happens during the ionisation of the atom. Explain why?
Why is the ${E^\Theta }$ value for the $Mn ^{3+} / Mn ^{2+}$ couple much more positive than that for $Cr ^{3+} / Cr ^{2+}$ or $Fe ^{3+} / Fe ^{2+} ?$ Explain.
A blue colouration is not obtained when
Which of the following is wrongly matched