Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2020
Exam
NEET
Year
2020
Subject
Chemistry
Chapter
d and f Block Elements

NEET 2020 · Chemistry · d and f Block Elements

Identify the incorrect statement from the following:

Identify the incorrect statement from the following:

Options

  1. AZirconium and Hafnium have identical radii of 160pm160pm and 159pm,159pm, respectively as a consequence of lanthanoid contraction.
  2. Blanthanoid reveal only +3+ 3 oxidation state.
  3. CThe lanthanoid ions other than the f0{f}^{0} type and the f14{f}^{14} type are all paramagnetic.
  4. DThe overall decrease in atomic and ionic radii
    from lanthanum to lutetium is called lanthanoid
    contraction.

Correct answer

B. lanthanoid reveal only +3+ 3 oxidation state.

Step-by-step solution

lanthanoid shows general oxidation state +3+ 3 but some elements can shows +2+ 2 as well as +4.+ 4 . So the given option is wrong.
Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Although +3 oxidation state is most common in lanthanoids, cerium still shows +4… NEET 2026The lanthanide ion having four unpaired electrons is (Given : Atomic numbers of Ce =58… NEET 2026The green paramagnetic species formed by heating KMnO _4 at 513 K is NEET 2026The calculated 'spin-only' magnetic moment of Ti^ 2+ \ (3d^2) is : NEET 2026Match List I with List II : List I (Transition metal/compound/complex) List II (Catalytic… NEET 2026Given below are two statements : One is labelled as Assertion A and the other is labelled… NEET 2026Given below are two statements : Statement I : Ferromagnetism is considered as an extreme… NEET 2025Which of the following set of ions act as oxidising agents? NEET 2024 Full d and f Block Elements list All NEET PYQs