Which of the following is true about HPLC and gas chromatography?
In Gas Chromatography, the stationary phase is always solid
In HPLC, the stationary phase is solid
In HPLC, the mobile phase is a liquid or solid
In Gas chromatography, the mobile phase is always gas
Ans. is 'd' i.e., In gas chromatography, the mobile phase is always gasif a solute has an affinity for the mobile phase, it moves faster. If a solute has an affinity for stationary phase, it gets retarded.That way, the solutes get separated based on differential distribution of them between a mobile phase and a stationary phase.