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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
  • Which of the following regions is the lowest temperature region :
    Stratosphere
    Troposphere
    Mesosphere
    Thermosphere
  • Ozone is formed in the upper atmosphere from oxygen by the action of :
    Nitrogen oxides
    Ultraviolet rays
    Cosmic rays
    Free radicals
  • BHC and DDT are :
    Insecticides
    Fungicides
    Herbicides
    All the above
  • Pesticides are mainly :
    Biological pollutants
    Physical pollutants
    Biodigradable pollutants
    Non biodigradable pollutants
  • Which of the following substances is related to Bhopal gas tradedi :
    Phosphene
    Chloropicrin
    Methyl isocynide
    Chloroform