Example 1 · difficulty 4/5
A first-transition-series element M forms M²⁺ with a 3d⁵ configuration and reaches +7 in the oxide M₂O₇. Identify M and its formal d-electron count in the +7 oxidation state.
- A. Mn; 3d⁰
- B. Cr; 3d⁰
- C. Fe; 3d¹
- D. Mn; 3d²
2025 source guide · Chemistry
NEET 2025 Chemistry D- and F-Block Elements Questions
Connect the official 2025 paper with current Chemistry practice without labelling original previews as PYQs.
200 original questions · explicit provenance labels
ChemistryPlate 68
NeetVellum atlas · fig. chemistry
68
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 3/5
Which pair of electronic configurations for the common copper ions is correct?
- A. Cu⁺: [Ar] 3d⁹; Cu²⁺: [Ar] 3d⁸
- B. Cu⁺: [Ar] 3d¹⁰; Cu²⁺: [Ar] 3d⁹
- C. Cu⁺: [Ar] 3d¹⁰ 4s¹; Cu²⁺: [Ar] 3d¹⁰
- D. Cu⁺: [Ar] 3d⁸ 4s²; Cu²⁺: [Ar] 3d⁷ 4s²
Example 3 · difficulty 1/5
What is the direct electronic cause of colour in many aqueous transition-metal ions?
- A. Visible light completely removes a d electron from the ion
- B. Radioactive decay of the metal nucleus emits coloured light
- C. Vibration of the whole hydrated ion occurs without electronic excitation
- D. Visible light promotes an electron from a lower-energy d level to a higher-energy d level
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 2025 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 2025 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.