Preparation and Properties of K2Cr2O7 and KMnO4 — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Preparation and Properties of K2Cr2O7 and KMnO4.

Stoichiometry and Titration Calculations

high

NEET frequently tests quantitative aspects. A question could involve a titration problem where a known volume and concentration of $KMnO_4$ (or $K_2Cr_2O_7$) is used to titrate an unknown sample (e.g., $Fe^{2+}$ or oxalate). Students would need to correctly identify the n-factor for the oxidizing agent in the given medium, balance the redox reaction, and then perform stoichiometric calculations to find the concentration or amount of the analyte. This combines redox principles with quantitative analysis, a favorite for NEET.

Mechanism of Catalysis/Decomposition

medium

While direct mechanisms are less common, a question could delve into why $KMnO_4$ solutions decompose slowly or why $MnO_2$ acts as a catalyst for its own decomposition. This would test a deeper understanding of its stability issues beyond just stating it's not a primary standard. For instance, asking about the role of $MnO_2$ in the decomposition of $KMnO_4$ or factors affecting its shelf-life could be a slightly more advanced conceptual question.

Industrial Applications and Environmental Impact

low

While not a core NEET focus, questions occasionally touch upon practical applications or environmental aspects. For example, a question might ask about the use of $KMnO_4$ in water purification or the use of $K_2Cr_2O_7$ in leather tanning, and potential environmental concerns associated with chromium waste. This would test broader knowledge and awareness, moving beyond just chemical reactions to real-world context.