Consider the following statements (1) The basic strength of hydroxides of lanthanides decreases from La(OH)_3 " to " Lu(OH))_3 (2) The lanthanoid ion Lu^(3+) Yb^(2+) and Ce^(4+) are diamagnetic (3) The corret order of ionic radii of Ce^(3+) , La^(3+) Pm^(3+) and Yb^(3+) is Yb^(3+) lt Pm^(3+) lt La^(3+) lt Ce^(3+) Which of the statemnets given above is / are correct ?

Consider the following statements (1) The basic strength of hydroxide

1.	Consider the following statements (1) The basic strength of hydroxides of lanthanides decreases from La(OH)_3 " to " Lu(OH))_3 (2) The lanthanoid ion Lu^(3+) Yb^(2+) and Ce^(4+) are diamagnetic (3) The corret order of ionic radii of Ce^(3+) , La^(3+) Pm^(3+) and Yb^(3+) is Yb^(3+) lt Pm^(3+) lt La^(3+) lt Ce^(3+) Which of the statemnets given above is / are correct ?
Answer» 1 only 1,2 only 1,2 and 3 None to these Solution :`Lu = [XE] 4f^(14) 5d^(1)6s^(2)` `YB = [Xe] 4f^(14) 5d^(0) 6s^(2)` `Ce = [Xe] 4f^(1)5d^(1) 6s^(2)`