Computed directly from all 195 questions across GATE CH 2024, 2025, and 2026, question counts per topic per year, not estimates.
| Topic | 2024 | 2025 | 2026 | 3-Yr Avg |
|---|---|---|---|---|
| Reaction Engineering | 8 | 9 | 9 | 8.7 |
| Mathematics | 9 | 8 | 8 | 8.3 |
| Thermodynamics | 6 | 6 | 6 | 6 |
| Mass Transfer | 4 | 6 | 6 | 5.3 |
| Fluid Mechanics | 6 | 4 | 6 | 5.3 |
| Heat Transfer | 5 | 6 | 4 | 5 |
| Process Control | 5 | 4 | 4 | 4.3 |
| Mechanical Operations | 3 | 4 | 4 | 3.7 |
| Chemical Technology | 3 | 3 | 3 | 3 |
| Plant Economics | 2 | 2 | 2 | 2 |
| Distillation | 2 | 2 | 1 | 1.7 |
| Numerical Methods | 1 | 1 | 1 | 1 |
| Instrumentation | 0 | 1 | 1 | 0.7 |
| Kinetics | 1 | 0 | 0 | 0.3 |
| General Aptitude (not GATE CH-specific) | 10 | 9 | 10 | 9.7 |
Figures are raw question counts (not marks-weighted, this dataset doesn't track per-question marks), computed directly from the 195 GATE Chemical Engineering questions in our 2024–2026 archive (65 per year). Reaction Engineering has appeared most consistently, averaging 8.7 questions/year over the three years.
General Aptitude (9.7questions/year) is a fixed section of every GATE paper across all disciplines, not specific to Chemical Engineering, so it's shown separately rather than folded into the topic ranking above.
Each topic links to its full study guide, weightage, formulas, derivations, and worked problems , and every question behind these counts is answer-first indexed at the PYQ archive, or practiceable in the interactive year-wise tests.
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