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Welcome to eGyanKosh’s Unit-3 on the Evaluation of Chemical Products or Processes, an essential component of the study material offered by the Indira Gandhi National Open University (IGNOU) for the year 2025. This unit provides an in-depth exploration of methodologies and criteria for assessing the efficiency, safety, and sustainability of chemical products and processes. Tailored for students pursuing their academic goals in the field of chemistry and related disciplines, this resource serves as a comprehensive guide designed to enhance your understanding and critical thinking skills. Best of all, the study material is available for free download, enabling accessible education for all. Dive in and enrich your learning experience with this valuable resource!