Which of the following is an example of a chromatography technique?

Gas chromatography is indeed an example of a chromatography technique because it utilizes a mobile phase (gas) to separate different components within a mixture based on their volatility and interaction with the stationary phase, which is often a solid or a liquid on a solid support. This technique is widely used for analyzing volatile compounds and can provide detailed information about the composition of complex mixtures.

The process involves injecting a sample into a stream of gas and passing it through a column where the components interact with the stationary phase. The differences in the speed at which different substances travel through the column lead to their separation, allowing for quantitative and qualitative analysis of the components. This makes gas chromatography an essential method in various fields, including environmental testing, forensics, and quality control in pharmaceuticals, demonstrating its relevance and application in the biochemical and biotechnological industries.