Which purification method would fail to separate a mixture of two organic solids with identical sublimation temperatures
Sublimation relies on sublimation temperature differences, ineffective here. Crystallization or extraction using water solubility would work instead.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Purification Methods - Crystallization Distillation Chromatography