Which of the following is colourless in water?
(A) \(Ti^{3+}\)
(B) \(V^{3+}\)
(C) \(Cu^{2+}\)
(D) \(Sc^{3+}\)

Which of the following is strongest base? (A) \(Sc(OH)_{3}\) (B) \(La(OH)_{3}\) (c) \(Lu(OH)_{3}\) (D) \(Yb(OH)_{3}\)

(i) Which of the following are coloured in aqueous solution ? Give reasons : V^(3+) , Cu^(+) , Sc^(3+) , Fe^(3+) (ii) Which of the following oxides are amphoteric ? Mn_2O_7, CrO_3, Cr_2O_3, V_2O_5 .

Predict which of the following will be coloured in aqueous solution ? Ti^(3+), V^(3+),Cu^(+),Sc^(3+), Mn^(2+), Fe^(3+), Co^(2+) .

Which of the following transition metal catios have noble gas core? (a) Sc^(3+) (b) Y^(3+) (c) La^(3+) (d) Ac^(3+)

(i)Which one out of Fe^(2+) and Fe^(3+) ions is more paramagnetic and why (ii)Which of the following ions are expected to becoloured and why Fe^(2+), Mn^(2+), Cr^(3+), Cu^(+) Sc^(3+), Ti^(4+)

Which of the following ions are expected to be coloured ? Ni^(2+) , Ti^(3+) , Cu^(+) , Sc^(3+) , Zn^(2+)