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

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

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

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

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

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

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

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

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

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

    crystallization
    centrifugation
    chromatography
    calligraphy
  • Absorbents are:

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

    paper that is soluble in ether
    paper that is soluble in water
    paper that is partly partitioned and partly absorbs
    paper that is partly partitioned but non absorbent
  • 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
    formation of shapes from a substance that can be used to wear ornaments
    none of these are right
  • Crystals can form:

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

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

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

    filtration of the solution
    choice of solvent
    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

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

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

    cartography
    colour printing
    calligraphy
    colour writing
  • Who discovered chromatography ?

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

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

    Centrifugation
    Adsorption chromatography
    Paper chromatography
    Gas liquid partition chromatography
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