NEET UG 2021 · Chemistry · Question 68
NEET 2021 Chemistry, question 68
Question 68 of the NEET 2021 paper (code O1) is a Chemistry question from The d- and f-Block Elements. Its idea, Properties of Lanthanoids and Actinoids, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 4.
Updated 2026-10-08
Q68 · Chemistry
The incorrect statement among the following is :
- 1Lanthanoids are good conductors of heat and electricity.
- 2Actinoids are highly reactive metals, especially when finely divided.
- 3Actinoid contraction is greater for element to element than Lanthanoid contraction.
- 4Most of the trivalent Lanthanoid ions are colorless in the solid state.Official answer
Official answer: option 4 · NTA final answer key
Same idea
The only question on Properties of Lanthanoids and Actinoids
No other NEET paper from 2017–2026 tested this exact idea.
Properties of Lanthanoids and Actinoids: every question and how it was framed
The chapter
The d- and f-Block Elements in ten years of NEET
21 questions from 2017–2026, asked in 10 of 10 papers, about 2.0 a paper. d- and f-Block Elements alone had 21.