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JEE Main Chemistry question

ChemistryThe d and f-Block ElementsJEE Main

How many of the following are lanthanoids? Uranium, praseodymium, erbium, gadolinium, curium, hafnium, osmium, iridium

Answer: 3

Solution

Praseodymium, erbium and gadolinium are lanthanoids; uranium and curium are actinoids,

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Question ID VK-147993