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Identify the incorrect statement from the following :
Question

Identify the incorrect statement from the following :

A.

The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction

B.

Zirconium and Hafnium have identical radii of 160pm and 159pm, respectively as a consequence of lanthanoid contraction

C.

Lanthanoids reveal only +3 oxidation state

D.

The lanthanoid ions other than the f° type and the f¹⁴ type are all paramagnetic

Correct option is C

Ans.(c)
Lanthanoids can also show +2 or +4 oxidation states in solution or in solid compounds.

Most common oxidation state of Lanthanoids is +3

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