A) increases
B) decreases
C) first increases and then decreases
D) does not change
Correct Answer: B
Solution :
[b] Across lanthanoid series basicity of lanthanoid hydroxides decreses. The basicity decreses form \[Ce{{(OH)}_{3}}\] to\[Lu{{(OH)}_{3}}\]. Due to lanthanide contraction, the decrease in the size of the cation increases the covalent character between the lanthanide ion and hydroxide ion thereby, reducing the basic character of the lanthanide hydroxide.You need to login to perform this action.
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