General Introduction — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in General Introduction.

Identification of non-transition d-block elements

high

The distinction between d-block elements and true transition elements (excluding Zn, Cd, Hg) is a fundamental concept and a common point of confusion. NEET frequently tests this precise definition, often asking to identify the element that does not fit the 'transition' criteria or to explain why. This tests conceptual understanding rather than just rote memorization of block positions. Students must understand the 'incompletely filled d-orbital' clause.

Anomalous electronic configurations

high

The electronic configurations of Chromium and Copper (and their heavier congeners) are classic exceptions to the Aufbau principle, driven by the stability of half-filled or completely filled d-orbitals. These exceptions are prime candidates for MCQs, as they test attention to detail and understanding of stability factors. Questions might ask for the correct configuration or the reason for the anomaly.

General electronic configurations of d-block vs. f-block

medium

While basic, questions asking to recall the general electronic configuration for either d-block or f-block elements, or to differentiate between them, are common. These questions assess foundational knowledge and ensure students can correctly assign the principal quantum numbers for the s, d, and f orbitals involved. Traps often involve interchanging the configurations or using incorrect principal quantum numbers.

Placement of f-block elements based on atomic number

medium

Knowing where the lanthanoid (4f) and actinoid (5f) series begin (Z=58 and Z=90, respectively) is important. Questions might provide an atomic number and ask for the block and series, requiring students to recall these specific starting points and the filling order after the preceding d-block elements.