NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Solid or liquid
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Liquid or gas
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Gas only
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Liquid only
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Detailed explanation-1: -4. In chromatography, which of the following can the mobile phase be made of? Explanation: In chromatography, the mobile phase can be composed of liquid or gas. It cannot be a solid material.
Detailed explanation-2: -In normal-phase LLC, the support is coated with a polar stationary phase, whereas a relatively nonpolar solvent is used as mobile phase. In reversed-phase LLC, the two LLC phases are interchanged so that the less polar liquid is now the stationary phase and the polar liquid is the mobile phase.
Detailed explanation-3: -Gas chromatography is a “gas-liquid” chromatography. Its carrier phase consists of gases as He or N2. Mobile phase which is an inert gas is passed through a column under high pressure.