2021 source guide · Chemistry

NEET 2021 Chemistry D- and F-Block Elements Questions

Use this page to connect the official 2021 paper with current Chemistry practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 118 verified questions →Check official NTA archive ↗

What to master

electronic configurations, oxidation states, colour, magnetism and lanthanoid trends.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 2/5

Which description best matches the trend in atomic radii across the first transition series?

  • A. They increase uniformly from Sc to Zn
  • B. They decrease sharply and uniformly from Sc to Zn
  • C. They remain exactly constant from Sc to Zn
  • D. They decrease at first, vary only slightly through much of the middle, and increase slightly at the end

Example 2 · difficulty 3/5

Why are the atomic radii of zirconium and hafnium nearly equal even though hafnium is in the next period?

  • A. Lanthanoid contraction reduces the expected size of hafnium
  • B. The 4f electrons shield the nuclear charge perfectly in hafnium
  • C. Hafnium has one fewer occupied electron shell than zirconium
  • D. Zirconium and hafnium have the same total number of electrons

Example 3 · difficulty 2/5

Which relation between the radii of Fe³⁺ and Fe²⁺ is correct?

  • A. r(Fe³⁺) > r(Fe²⁺)
  • B. r(Fe³⁺) < r(Fe²⁺)
  • C. r(Fe³⁺) = r(Fe²⁺)
  • D. Their radii cannot be compared because both ions contain 3d electrons

The evidence-first practice loop

  1. 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
  2. 2. Attempt closed-bookExpose the concept or execution gap before rereading.
  3. 3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

The d- and f-Block Elements →

Frequently asked questions

Are these official NEET 2021 Chemistry D- and F-Block Elements PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2021 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.

Built by NeetVellum · original practice, explicit provenance, no fabricated PYQ claims.
NEET 2021 Chemistry D- and F-Block Elements Questions · NeetVellum