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JEE Main Chemistry question

ChemistryThe d and f-Block ElementsJEE Main

Consider the following statements. (I) is the least basic among hydroxides of lanthanides (II) and possess almost the same ionic radii (III) can act as an oxidizing agent Which of the above is/are true?

Answer: (B)

Solution

(I) is false — has the largest ionic radius among lanthanide(III) ions, so is actually the MOST basic hydroxide in the series (basicity decreases as ionic radius shrinks across the series). (II) is true: lanthanide

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Question ID VK-147359