A) \[La{{(OH)}_{3}}\] is less basic than \[Li{{(OH)}_{3}}\]
B) In lanthanide series ionic radius of \[L{{n}^{3+}}\] ion decreases
C) La is actually an element of transition series rather lanthanide
D) Atomic radius of Zn and Hf are same because of lanthanide contraction
Correct Answer: A
Solution :
\[La{{(OH)}_{3}}\] is more basic than \[Li{{(OH)}_{3}}\]. In lanthanides the basic character of hydroxides decreases as the ionic radius decreases.
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