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Q.

Select the correct chemical characteristics of actinoids.

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a

They do not react with alkalies

b

They are only slightly affected by nitric acid owing to the formation of protective oxide layer 

c

The action of boiling water on them gives a mixture of oxide and hydride 

d

They are highly reactive metals

answer is A.

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Detailed Solution

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The elements 89 to 103 that make up the actinides gradually fill their 5f sublevel. The d-block and f-block elements of the actinide family have characteristics and are both common metals, but they are also radioactive. Alkalies are not used in the reaction.

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