JEE Advanced Chemistry question

Statement 1: Oxalates and carbonates of lanthanides are almost insoluble in water. Statement 2: Salts of lanthanides usually contain water of crystallisation.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

Lanthanide oxalates and carbonates are indeed almost insoluble in water, following the solubility pattern shown by alkaline earth (group 2) oxalates/carbonates — this insolubility is exploited to separate/precipitate lanthanides as oxalates. Statement 1 is true. Statement 2 is also true — lanthanide salts commonly

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Question ID VK-159592