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Chromatography

Daniel Brand 8 preguntas

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Preguntas del test (8)

  1. 1Which of the following statements are true about chromatography? Select all that apply.
    1. AIt separates mixtures into its distinct constituents.
    2. BIt consists of stationary and mobile phases.
    3. CThe solvent used is water-based.
    4. DChromatography can only separate molecules based on their size.
  2. 2TLC stands for [blank_start]thin[blank_end] [blank_start]layer[blank_end] [blank_start]chromatography[blank_end].
    1. Athin
    2. Blayer
    3. Cchromatography
  3. 3For which of the following biological molecules would you use water as the mobile phase? Check all that apply.
    1. AAmino acids
    2. BFats
    3. CGlucose
    4. DOils
  4. 4Label this diagram:Imagen de la pregunta 4
    1. ABeaker
    2. BStationary phase
    3. CMobile phase
    4. DWatch glass
    5. EChromatography paper
    6. FSolvent
    7. GSpot of mixture
    8. HBeaker
    9. IPencil line
    10. JWatch glass
    11. KStationary phase
    12. LBeaker
    13. MPencil line
    14. NSolvent
    15. OSolvent
    16. PStationary phase
    17. QSpot of mixture
    18. RChromatography paper
    19. SWatch glass
    20. TSolvent
    21. UPencil line
    22. VBeaker
    23. WChromatography paper
    24. XSpot of mixture
    25. YSpot of mixture
    26. ZChromatography paper
    27. AABeaker
    28. ABWatch glass
    29. ACStationary phase
  5. 5The rate at which different molecules move along the stationary phase depends on...
    1. ASize
    2. BPolarity
    3. CSolubility
    4. DElectronic charge
  6. 6Which of the following statements best explains how different molecules 'climb' chromatography paper at different rates?
    1. APolar molecules travel faster because they don't form hydrogen bonds with the paper.
    2. BPolar molecules travel faster because they form hydrogen bonds with the paper.
    3. CNon-polar molecules travel faster because they don't form hydrogen bonds with the paper.
    4. DNon-polar molecules travel faster because they form hydrogen bonds with the paper.
  7. 7Once a chromatography run has completed, you can identify the components in the mixture by finding their Rf values.

    Rf = x / y

    Which statements are true about this formula?
    1. Ax is the distance travelled by the solvent
    2. Bx is the distance travelled by the component
    3. Cy is the distance travelled by the solvent
    4. Dy is the distance travelled by the component
  8. 8Three ways of visualising the molecular components separated during chromatography include shining [blank_start]a UV light[blank_end] over a [blank_start]TLC plate[blank_end], spraying [blank_start]ninhydrin[blank_end] on [blank_start]amino acid molecules[blank_end], or adding [blank_start]iodine crystals[blank_end].
    1. Aa UV light
    2. Bwhite light
    3. Cdifferent coloured lights
    4. Dinfrared light
    5. ETLC plate
    6. Fgas chromatography column
    7. Gmobile phase
    8. Hninhydrin
    9. Iamino acid molecules
    10. Jstarch
    11. Ksodium hydrogen carbonate
    12. Lamino acid molecules
    13. Mtriglyceride molecules
    14. Nreducing sugars
    15. Onon-reducing sugars
    16. Piodine crystals
    17. Qchlorine gas
    18. Ralkaline solution
    19. Scopper sulphate

Información

Descripción
(Biological Molecules) Biology Test sobre Chromatography, creado por Daniel Brand el 20/02/2017.
Idioma
English
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