This document outlines various physical evaluation tests performed on crude drugs, including moisture content, optical rotation, refractive index, melting point, viscosity, solubility, ash values, extractive values, and volatile oil content. These tests are used to standardize crude drugs and determine their composition and purity. Key tests mentioned include determining moisture content by heating to a constant weight, measuring viscosity and refractive index, identifying melting point ranges, assessing solubility in various solvents, calculating ash, water-soluble extract, and alcohol-soluble extract values, and quantifying volatile oil content. The results of these tests provide information about crude drug identity and quality.