Q. Incorrect statement is
A) Atomic radii of Zr and Hf are same because of lanthanide contraction
B) Zn and Hg do not show variable valency
C) Across the lanthanides series, the basicity of lanthanide hydroxides decreases
D) Protactinium is transuranic element
Explanation
The correct answer is Option D: Protactinium is transuranic element.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.