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AQA (9-1) Topic 8

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Preguntas del test (8)

  1. 1Artificial colours can be detected and identified using:
    1. AFiltration
    2. BPaper chromatography
    3. CFlame tests
    4. DMass spectrometer
  2. 2Paper chromatography works because some of the coloured substances are better at dissolving in the liquid than they are at bonding with the paper, so they travel further [blank_start]up[blank_end] the paper.
    1. Aup
  3. 3There are four gases you need to know how to test. Select the correct gas, and fill the blanks for the tests below.

    [blank_start]Hydrogen[blank_end] can be tested by placing [blank_start]a light splint[blank_end] over the end of a test tube, and hearing a 'squeaky pop'.

    [blank_start]Oxygen[blank_end] can be tested by placing a [blank_start]glowing splint[blank_end] over the end of a test tube, and seeing it relight.

    [blank_start]Carbon dioxide[blank_end] can be tested by bubbling the gas through limewater, and seeing it turn cloudy.

    [blank_start]Chlorine[blank_end] can be tested for by holding [blank_start]damp blue[blank_end] litmus paper over the end of a test tube, and seeing it turn [blank_start]red, then white[blank_end].
    1. AHydrogen
    2. BOxygen
    3. CCarbon dioxide
    4. DChlorine
    5. Ea lighted splint
    6. Fa glowing splint
    7. GOxygen
    8. HHydrogen
    9. ICarbon dioxide
    10. JChlorine
    11. Kglowing splint
    12. Llighted splint
    13. MCarbon dioxide
    14. NOxygen
    15. OHydrogen
    16. PChlorine
    17. QChlorine
    18. ROxygen
    19. SHydrogen
    20. TCarbon dioxide
    21. Udamp blue
    22. Vdry blue
    23. Wdamp red
    24. Xdry red
    25. Yred, then white
    26. Zblue, then white
  4. 4Paper chromatography consists of two stages:
    the [blank_start]stationary[blank_end] phase (a.k.a. the phase that doesn't move - this is the [blank_start]paper[blank_end])
    the [blank_start]mobile[blank_end] phase (a.k.a. the phase that moves - this is the [blank_start]solvent[blank_end])
    1. Astationary
    2. Bpaper
    3. Csolvent
    4. Dmobile
  5. 5A formulation is a [blank_start]mixture[blank_end] that has been designed as a useful product.
    1. Amixture
    2. Bcompound
    3. Celement
  6. 6Pure substances will melt and boil [blank_start]at specific[blank_end] temperatures, so we can use the temperature that a substance melts/boils at to tell how [blank_start]pure[blank_end] it is. Impure substances will melt [blank_start]over a range of[blank_end] temperatures. If a substance is [blank_start]impure[blank_end] it will generally also have a [blank_start]lower[blank_end] melting point and a [blank_start]higher[blank_end] boiling point.
    1. Aat specific
    2. Bover a range of
    3. Cpure
    4. Dimpure
    5. Elower
    6. Fhigher
  7. 7A pure substance is either a single element, or compound, that is not mixed with any other substance.
    1. AVerdadero
    2. BFalso
  8. 8If the red spot moved 7 cm, and the solvent moved 9 cm, then what is the Rf value of the red spot? (give answer to 2 d.p.) [blank_start]0.78[blank_end]Imagen de la pregunta 8
    1. A0.78

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Descripción
GCSE (AQA) Chemistry Test sobre AQA (9-1) Topic 8, creado por https:// revisechemistry.uk el 06/03/2018.
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