1. Khối 8
  2. Science 8
  3. Chemistry
  4. Unit 8. Mixtures
  5. Chromatography
  • Complete the sentences.
    A line on the chromatogram must be drawn by pencils because graphite in pencils is not
    by the solvents
    Đáp án
    A line on the chromatogram must be drawn by pencils because graphite in pencils is not
    dissolved
     by the solvents
    Giải thích
    The correct answer
    dissolved
    1/1
  • Choose the correct answer.
    Ink particles that do not travel far from the ink spot are low in
    .
    Q and S
    P and R
    R and S
    P and Q
    Giải thích
    The correct answer
    P and Q
    Q and S
    R and S
    P and R
    1/1
  • Choose the correct answer.
    Ink from water-resistant markers need to be dissolved in
    .
    Alcohol
    Water
    Giải thích
    The correct answer
    Alcohol
    Water
    1/1
  • Choose the correct answer.
    The ink spot should be above the water level to avoid the
    of ink into water
    Pollution
    Contamination
    Solvation
    Dissolution
    Giải thích
    The correct answer
    Dissolution
    Solvation
    Contamination
    Pollution
    1/1
  • Choose the correct answer.
    Water dissolves the ink and carry ink
    with it
    Color
    Odour
    Particles
    Giải thích
    The correct answer
    Particles
    Color
    Odour
    1/1
  • Choose the correct answer.
    Ink particles that do not travel far from the ink spot are low in
    .
    Molarity
    Salinity
    Normality
    Polarity
    Giải thích
    The correct answer
    Polarity
    Molarity
    Normality
    Salinity
    1/1
  • Choose the correct answer.
    Ink particles that travel far from the initial ink spot readily
    in water
    Decolor
    Dissolve
    Giải thích
    The correct answer
    Dissolve
    Decolor
    1/1
  • Choose the correct answer.
    In chromatography, blotting paper is called a
    .
    Chamber
    Spotter
    Chromatogram
    Giải thích
    The correct answer
    Chromatogram
    Spotter
    Chamber
    1/1
  • Choose the correct answer.
    Ink from water-resistant markers cannot dissolve in water because they are
    .
    Polar
    Precipitate
    Non polar
    Solution
    Giải thích
    The correct answer
    Non polar
    Polar
    Precipitate
    Solution
    1/1
  • Choose the correct answer.
    Ink particles that do not travel far from the ink spot are low in
    .
    P and Q
    R and S
    Q and S
    P and R
    Giải thích
    The correct answer
    P and Q
    Q and S
    R and S
    P and R
    1/1
  • Choose the correct answer.
    The color in ink can be separated on paper due to the difference in
    .
    Smell
    Polarity
    Color
    Electronegativity
    Giải thích
    The correct answer
    Polarity
    Color
    Smell
    Electronegativity
    1/1
  • Choose the correct answer.
    can be used to separate mixture of different colours
    Filtration
    Decanting
    Chromatography
    Condensation
    Giải thích
    The correct answer
    Chromatography
    Condensation
    Filtration
    Decanting
    1/1
  • Choose the correct answer.
    If the ink does not dissolve in water, other
    should be used
    Separating methods
    Paper
    Solvent
    Giải thích
    The correct answer
    Solvent
    Paper
    Separating methods
    1/1
  • Choose the correct answer.
    Chromatography can be applied to different types of
    liquid
    Colored
    Decoloured
    Giải thích
    The correct answer
    Colored
    Decoloured
    1/1

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