MHT CET 2022 Chemistry question

Which among the following properties of lanthanoids is NOT true?

(A)Have greater coordination number than six
(B)All are non radioactive elementsCorrect
(C)Good conductors of heat and electricity
(D)Strongly paramagnetic

Answer: (B)

Solution

Lanthanoids (Ce-Lu, 4f series) show high coordination numbers (6 to 12) because of their large size, so (A) is true. They are silvery-white metals and good conductors of heat and electricity, so (C) is true. Because of unpaired 4f

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Question ID VK-096962