The dand fblock elements - Result Question 81
####81. Which of the following statement is not correct?
[2001]
(a) $La(OH)_3$ is less basic than $Li(OH)_3$
(b) La is actually an element of transition series rather lanthanides
(c) Atomic radius of $Zr$ and $Hf$ are same because of lanthanide contraction
(d) In lanthanide series ionic radius of $Ln^{+3}$ ions decreases
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Solution:
- (a) $La(OH)_3$ is more basic than $Li(OH)_3$. In lanthanides, the basic character of hydroxides decreases as the ionic radius decreases.
