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Consider the following statements: (...

Consider the following statements:
(I) La`(OH)_(3)` is the least basic among the hydroxides of Ianthanoids.
(II) `Zr^(4+)` and `Hf^(4+)` possess almost same ionic radii.
(III) `Cr^(4+)` can act as an oxidising agent .
which of the above statement is/ are true?

A

(I) and (III)

B

(II) and (III)

C

(II) only

D

(I) and (II)

Text Solution

Verified by Experts

The correct Answer is:
B
`Zr^(4+) and Hf^(4+)` possess almost the same ionic radii due to lanthanide contraction and `Ce^(4+)` is an oxidizing agent. `La(OH)_3` is the most basic among lanthanide hydroxides.
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