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Question

Oxidation states shown by lanthanoids is/are

A
+2
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B
+3
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C
+4
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D
None of these
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Solution

The correct options are
A +2
B +3
D +4
Oxidation states shown by lanthanoids are +2, +3 and +4.
+3 oxidation state is the common oxidation state of lanthanoids.
It is obtained by the loss of two 6s electrons and one 5d or 4f electron.

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