can someone please help me with the right answer for the following questions. ca

Question

can someone please help me with the right answer for the following questions. can you please answer all of them or dont attempt to answer. thank you.

1. Which ONE of the following is TRUE with regards to the basis of the technique of chromatography, when separating components of a mixture? A. The absorption of infrared radiation by the components B. The interaction of the components with both stationary and mobile phases The differing movement of particles of different mass in an electric field The deflection of charged particles in a magnetic field 2. A student runs a sample of acetone through a gas chromatogram at 50°C. The acetone produces a peak after 4.1 minutes. The student then injects a mixture of unknown organic substances into the same column at the same temperature. The chromatogram produces 3 peaks after 3.5, 4.1 and 7.6 minutes. Which ONE of the following is TRUE? A. The mixture has three components, one of which must be acetone. B. The mixture has at least three components, one of which might be acetone C. The mixture has at least three components, one of which must be acetone D. The mixture has three components, but acetone is not one of them 3. n layer chromatography can be used to distinguish between different amino acids. If a particular amino acid has low solubility in the mobile phase used, then the amino acid will have which ONE of the following? A. Will have a low Rg value. B. Will spend more time dissolved in the mobile phase than attached to the stationary phase. C. Must have a high molecular mass. D. Will move at a speed close to that of the solvent. 4. A mixture of ethanol (C2H6O) and butanol (C4H10O) is approximately 90% ethanol and 10% butanol. The mixture is passed through a gas chromatography column. The chromatogram is likely to show that, compared to butanol, the ethanol has which ONE of the following? A. A shorter retention time and a smaller area under the peak. B. A shorter retention time and a larger area under the peak. C. A longer retention time and a larger area under the peak. D. A smaller retardation factor and a larger area under the peak.

Explanation / Answer

1. option 2(includes interaction of mobile and stationary particles)

2.option 3(one of the part is acetone)

3.option 1(Rf value decides solubilty)

4.option 2(retention factor is lower)

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