Example 1 · difficulty 2/5
Which ground-state electronic configuration correctly shows the copper exception?
- A. [Ar] 3d¹⁰ 4s¹
- B. [Ar] 3d⁹ 4s²
- C. [Ar] 3d¹⁰ 4s²
- D. [Ar] 3d⁸ 4s² 4p¹
2020 source guide · Chemistry
NEET 2020 Chemistry D- and F-Block Elements Questions
Use this page to connect the official 2020 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.
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 2 · difficulty 1/5
What is the electronic configuration of Fe³⁺ in terms of the argon core?
- A. [Ar] 3d³ 4s²
- B. [Ar] 3d⁵
- C. [Ar] 3d⁶
- D. [Ar] 3d⁵ 4s¹
Example 3 · difficulty 3/5
Which doubly charged ion has a half-filled 3d subshell?
- A. Fe²⁺
- B. Co²⁺
- C. Mn²⁺
- D. Ni²⁺
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2020 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 2020 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.