A joint initiative of IITs and IISc, the NPTEL GATE Portal provides free video solutions and practice sets specifically for engineering students.
You don't always need to buy expensive books to get quality solutions. Several reputable platforms provide past papers (often from 1990 to the most recent 2025/2026 sessions) for free:
Unitoperation is a dedicated hub for Chemical Engineering that houses a massive collection of solved questions, though some advanced features may require a subscription. Why Solved Papers are Critical GATE 2026 Test PAPERS & Syllabus - IIT Guwahati
For anyone tackling , solved papers are arguably your most potent study tool. They aren't just for practice—they’re a "cheat sheet" for understanding how the examiners think. Where to Find Free Solved Papers
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