Question

The lanthanide contraction is responsible for the fact that

(a) Zr and Hf have about the same radius

(b) Zr and Zn have the same oxidation state

(c) Zr and Y have about the same radius

(d) Zr and Nb have similar oxidation state.

Answer 1

Correct option (a) Zr and Hf have about the same radius

Explanation :

Due to lanthanide contraction, the elements of second and third i.e. Zr and Hf transition series resemble more with each other than the elements of first and second transition series.