Visual and Instrumental Methods refer to techniques used in scientific analysis that rely on visual observation or the use of instruments to gather data. These methods are essential in fields like chemistry and biology, where precise measurements and observations are crucial for understanding complex phenomena. Instrumental methods, such as spectroscopy and chromatography, allow scientists to analyze substances at a molecular level. By utilizing various instruments, researchers can obtain quantitative and qualitative data, leading to more accurate results and insights into the properties of materials and reactions.