Which of the following statements are TRUE for the lanthanides?
(A) The observed magnetic moment of Eu3+ at room temperature is higher than that calculated from spin - orbit coupling
(B) Lanthanide oxides are predominantly acidic in nature
(C) The stability of Sm(II) is due to its half-filled sub-shell
(D) Lanthanide(III) ions can be separated by ion exchange chromatography
Correct answer is
1
A and D
2
A and B
3
A and C
4
B and C