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Across the lanthanide series, the basici...

Across the lanthanide series, the basicity of the lanthanoid hydroxides:

A

first decreases and then increases

B

decreases

C

increases

D

first increase and then decreases

Text Solution

Verified by Experts

The correct Answer is:
B
The basicity decreases from `Ce(OH)_(3)` to `LU(OH)_(3)`. Due to lanthanide contraction, the decrease in the size of the cation increases the convent character between the lanthanide ion and hydroxide ino thereby, reducing the basic character of the lanthanide hydroxide.
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Knowledge Check

  • Across the lanthanide series , the basicity of the lanthanoide hydroxides:

    A
    increases
    B
    decreases
    C
    first increases and then decreases
    D
    does not change

  • The basicity of Lanthanide hydroxide

    A
    increases
    B
    decreases
    C
    first increases then decreases
    D
    first decreases and then increases

  • The basicity of Lanthanide hydroxide

    A
    increases
    B
    decreases
    C
    first increases then decreases
    D
    first decreases and then increases