Question
Question: Which is incorrect order of size ?...
Which is incorrect order of size ?
A
Ni < Pd ≈ Pt
B
Ti < Zr ≈ Hf
C
Ti <Zr<Hf
D
All are correct
Answer
Ti <Zr<Hf
Explanation
Solution
Due to lanthanide contraction size of Pd ≈ Pt and size of Zr ≈ Hf (size of 5d series elements is ≈ size of 4d series elements).