Consider the following statements, (I) La`(OH)_(3)` is the least basic among hydroxides of lanthanides. (II) `Zr^(4+) and Hf^(4+)` possess almost the
Consider the following statements,
(I) La`(OH)_(3)` is the least basic among hydroxides of lanthanides.
(II) `Zr^(4+) and Hf^(4+)` possess almost the same ionic radii
(III) `Ce^(4+)` can act as an oxidising agent.
Which of the above is/are true?
A. I and III
B. II and III
C. Only II
D. I and II
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Correct Answer - B
The basic character of hydroxide decreases from `La(OH)_(3) to Lu(OH)_(3)`.Due to smaller size of Lu, the Lu-OH bond attains more covalent character while `Zr^(4+) and Hf(4+)` has same ionic radii and `Ce^(4+)` is an oxidising agent.
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