Which of the followig lanthanoid ions are coloured (a). `Lu^(+3)` (b). `Pm^(+3)` (c). `Sm^(+3)` (d). `Eu^(+3)`

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

Which of the following lanthanoid ions, has zero magnetic moment ? [Ce (z = 58), Sm (z = 62), Eu (z = 63), Yb (z = 70)]

Which of the following lanthanoid ions is diamagnetic ? (At nos . Ce = 58 , Sm = 62, Eu = 63 , Yb =70)

Which of the following is correct if A = 3^(3^3), B = 3^(33^3) C = 3^(3^(33))" and D = 3^(333) ?