NEET UG · Chemistry · Classification of Elements and Periodicity in Properties
Ionization Enthalpy Anomaly: Nitrogen vs Oxygen
NEET asked Ionization Enthalpy Anomaly: Nitrogen vs Oxygen once in 2017–2026, in 2026. It belongs to Periodic Properties, in Classification of Elements and Periodicity in Properties (Chemistry).
Updated 2026-10-08
- Times asked
- 1
- in 2017–2026
- Papers
- 1
- of 10
- First asked
- 2026
- the only time
- Chance next paper
- 6%
- calibrated historical rate
Questions on this idea, by paper
2017–2026. 2026.
How NEET framed it
Assertion–reason is the usual form. Skill tested: concept.
- Assertion-reason on periodic trend
Chance asked next paper 6%
Every question
The question
From the official NEET UG papers, newest first. Open one for the full question, the options and the official answer.
- 2026 Q70Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The first ionization…Assertion–reason · Medium
Papers: NEET 2026.
Same topic
Other ideas in Periodic Properties
Periodic Properties has 11 ideas NEET has asked; 1 of them came up in more than one question.
- Ionization Enthalpy Trends3× · 2025
- Fluorine vs Chlorine Electron Gain Enthalpyonce · 2026
- s, p, d, f Block Classificationonce · 2025
- Electronegativity Trendsonce · 2024
- Radii of Isoelectronic Speciesonce · 2023
- IUPAC Nomenclature for Z > 100once · 2022
- Acidic, Basic, and Amphoteric Nature of Oxidesonce · 2020
- IUPAC Nomenclature for Elements Z > 100once · 2020
- Ionic Formulae from Configurationsonce · 2018
- Deducing Group, Period, and Block from Atomic Numberonce · 2017