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Chemistry in daily life Bio molecules Polymers Environmental chemistry Nitrogenous compound Aldehyde and ketone Alcohol and phenol Halo alkane Hydrocarbon Basic concept of organic chemistry Coordination chemistry d&f block element p-block element part 3 p – block element part 2 p-block element part 1 s-block element Hydrogen Principal of extraction of metal Surface chemistry Chemical kinetics Electro chemistry Solution Chemical equilibrium Thermodynamics State of matter Chemical bonding Classification of element Atomic structure Basic concept of chemistry
  • A colloid is purified by
    Distillation
    Chromatography
    Dialysis
    Electrolysis
  • Gold number represents:
    percentage of gold in gold biscuit
    percentage of gold in gold colloid
    colloid protection power
    percentage of gold in an alloy
  • Enzymes are:
    Proteins
    Microbes
    Inorganic substances
    None of the above
  • In which of the following processes is platinum used as a catalyst:
    In the manufacture of synthetic rubber
    in the synthesis of methanol
    formation of HNO3 by the oxidation of ammonia
    hardening of oils
  • A sol which functions as a protective colloid is :
    Geletin
    Au
    Fe(OH)3
    As2S3
  • Which property of the colloidal particles is due to light scattering :
    Diffusion
    Peptisation
    Tyndall effect
    Brownian movement
  • The migration of colloidal particles under the influence of electric field is called:
    Dialysis
    Brownian motion
    Electrical osmosis
    Cataphoresis
  • Which among the following is not a colloid:
    Gum arabic
    Jelly
    Chlorophyll
    Ruby glass
  • Gelatin is generally used in the manufacture of ice cream, because:
    it stops the formation of collide
    in stabilizing the mixture
    in stabilizing the colloid and preventing the formation of crystals
    None of the above
  • Physisorption generally takes place at
    Low temperature
    High temperature
    Room temperature
    None of the above