Question

Which of the following lanthanoids show +2 oxidation state besides the characteristic oxidation state +3 of lanthanoids? [NCERT Exemplar]
(a) Ce
(b) Eu
(c) Yb
(d) Ho.

Answer 1

Answer:

(b)Eu & (c) Yb

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Answer 2

Answer:

(b)Eu

Explanation:

Lanthanoid for which +2 and +3 oxidation states are common is Eu.

La has +3 oxidation state. Ce has +3 and +4 oxidation states. Nd has +2, +3 and +4 oxidation state.