Which of the following ions will exhibit colour in aqueous solutions?
$La^{3+}\, (Z = 57)$
$Ti^{3+} \,(Z = 22)$
$Lu^{3+} \,(Z = 71)$
$Sc^{3+} \,(Z = 21)$
In the first transition series, the highest $B.P. $ and $M.P.$ is of
Explain the variations in atomic radii of transition elements in group.
Most stable compound among the following is
In which of the following pairs are both the ions coloured in aqueous solution ?
(At. no. : $Sc = 21, Ti = 22, Ni = 28,$$ Cu = 29, Co = 27$)
Pair of ions which gives blue colour in aqueous state :
$V^{+4},\,Ni^{+2},\, Ti^{+3}, \,Co^{+2}, \,Fe^{+3}, \,Cu^{+2}$