Extraction of Copper — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Extraction of Copper.

Detailed mechanism of froth flotation with specific reagents.

high

While the general principle of froth flotation is often asked, NEET could delve deeper into the specific roles of collectors (e.g., pine oil, xanthates), frothers (e.g., cresols), and depressants (e.g., NaCN for ZnS). A question might present a scenario with multiple sulphide ores and ask how to selectively separate them using depressants, requiring a nuanced understanding of surface chemistry and reagent function. This tests application rather than just recall.

Thermodynamic feasibility of reduction steps (Ellingham Diagram interpretation).

medium

The chapter 'General Principles and Processes of Isolation of Elements' explicitly covers thermodynamic principles of metallurgy, including Ellingham diagrams. While direct diagram interpretation for copper might be complex for NEET, a conceptual question relating the stability of oxides/sulphides at different temperatures to the feasibility of reduction or the choice of reducing agent could be asked. For example, why self-reduction is possible for copper but not for iron, linking it to the relative stability of $Cu_2O$ and $Fe_2O_3$.

Environmental impact and mitigation strategies of copper extraction.

low

NEET has a growing emphasis on environmental aspects in biology and chemistry. Copper extraction is notorious for $SO_2$ emissions (acid rain) and heavy metal pollution. A question might touch upon the environmental consequences of roasting or smelting and potential mitigation strategies, such as converting $SO_2$ to sulphuric acid. While less common, it aligns with a broader awareness of industrial processes and their ecological footprint.