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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
  • In which among the following is Tyndall effect not expected:
    Gold sol
    sugar sol
    emulsion
    suspension
  • Fog is a colloidal system of
    Liquid in gas
    Gas in Gas
    Solid in gas
    Gas in Liquid
  • In reaction, 2SO2 + O2 - Pt/As2S3-> 2SO3 whe
    Positive catalyst
    Promoter catalyst
    Poison  catalyst
    Auto catalyst
  • Size of the colloidal particles ranges between :
    10-6 -- 10-9 cm
    10-9 -- 10-11 cm
    10-2 -- 10-3 cm
    10-5 -- 10-7 cm
  • In the manufacture of sulphuric acid platinised asbestos acts as a catalyst. it is an example of :
    Auto catalyst
    Induced catalyst
    Hetrogeneous catalyst
    Homogeneous catalyst
  • Catalyst used in lead chamber process is :
    Oxide of nitrogen
    Platinum
    Nickel
    MnO2
  • The use of a catalyst may :
    change the nature of the product in a reversible reaction
    change the equilibrium state of a reversible reaction
    cannot change the equilibrium state in a reversible reaction
    does not affect a reversible reaction
  • When a catalyst is added into a system then:
    equilibrium concentration decrease
    rate of forward reaction increases and rate of backward reaction decreases
    equilibrium concentration increase
    no effect on equilibrium concentration
  • when gas is dispersed in a liquid, the colloidal system is called :
    Emu
    Foam
    Sol
    Aerosol
  • Colloidal particles may be recognized by :
    small size of the ion
    high surface area/volume ration
    lower surface area/volume ration
    None of the above