Practice Test | Kullabs.com
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  • Centrifugation is defined as ______.

    process of separation of pure crystals from a solution
    method in which solid or liquid particles of different densities are separated by rotating them in tube in a horizontal circle.
    a technique of separating the constituents of a mixture of liquids
    none of these
  • Chromatography is used to separate the mixture of ______.

    solid
    liquid
    both solid and liquid
    solid only
  • The process of separation of pure crystals from a solution is called ______.

    distillation
    crystallization
    centrifugation
    chromatography
  • In which method of seperation of mixtures filter paper is not used?

    crystalization
    filtration
    sublimation
    chromatography
  • Which of them is the hardest crystal?

    moonstone
    diamond
    ruby
    saphire
  • Which one of these is not the method for separation of mixture?

    paper chromatography
    crystallization
    centrifugation
    calligraphy
  • ______________ is a method in which solid or liquid particles of different densities are separated by rotating them in the tube in a horizontal circle.

    calligraphy
    paper chromatography
    centrifugation
    crystallization
  • Which of these method uses the high speed moving electric motors?

    paper chromatography
    centrifugation
    crystallization
    calligraphy
  • Which of these method is used to separate cream from milk ?

    paper chromatography
    calligraphy
    crystallization
    centrifugation
  • Which of these methods woks on the principle of absorption or attraction of one substance in the other ?

    centrifugation
    chromatography
    calligraphy
    crystallization
  • Absorbents are:

    Substances that gets absorbed in other.
    Substances that are left after absorption.
    Substances that are left after evaporation.
    Substances that absorbs other.
  • Paper chromatography uses:

    paper that is soluble in water
    paper that is soluble in ether
    paper that is partly partitioned but non absorbent
    paper that is partly partitioned and partly absorbs
  • Crystals are:

    solid with regular periodic arrangement of structural unit such as atoms ions or molecules
    solid without regular periodic arrangement of structural unit such as atoms ions or molecules
    none of these are right
    formation of shapes from a substance that can be used to wear ornaments
  • Crystals can form:

    any of the shapes
    only irregular shapes
    only regular shapes
    definite geometrical shapes
  • Crystals formed by calcium carbonate are:

    cubical.
    hexagonal.
    non symmetrical because it cannot form crystals.
    alum.
  • The process of formation of crystals is called:

    crystallification
    crystal formation
    none of the answers are right
    crystallization
  • Which of the following is not the process of crystallization?

    choice of solvent
    filtration of the solution
    Solvent evaporation
    preparation of solution
  • A technique in which separation of vatious components is acieved by utilization of diffference in the degree to which various substances are attracted on to the surface of another substance is called

    centrifugation
    crystalization
    sublimation
    chromatography
  • Which one of the following is a technique in which a filter paper is taken as adsorbent material for analysing mixture by chromatography?

    Centrifugation
    Adsorption chromatography
    Gas liquid partition chromatography
    Paper chromatography
  • Chromatography means

    colour writing
    colour printing
    calligraphy
    cartography
  • Who discovered chromatography ?

    Mikhail Tswett
    Madam Curie
    Louis Pasture
    John Dalton
  • When was chromatography invented?

    19th century
    20th century
    21st century
    12th century
  • Which one of the following is based on the principle "A certain adsorbent can adsorb different substance to different extents"?

    Gas liquid partition chromatography
    Adsorption chromatography
    Paper chromatography
    Centrifugation
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