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In context of the lanthanoids, which of ...

In context of the lanthanoids, which of the following statements is not correct -

A

there is a gradual decrease in the radii of the members with increasing atomic number in the series

B

all the members exhibit + 3 oxidation state

C

because of similar properties the separation of lanthanoids is not easy

D

availability of 4f electrons results in the formation of compounds in + 4 state for the members of the series

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Verified by Experts

The correct Answer is:
D
The most stable oxidation state of lanthanoids is + 3. Some of the lanthnoids show + 2 and + 4 states.
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