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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
  • Boric acid is a polymer because :
    it is acidic in nature
    it contains H-bond
    its basicity is one
    it has sheet like geometry
  • Which acid is not a protonic acid :
    H3BO3
    H3PO3
    H2SO3
    HClO3
  • Al2O3 can be converted to anhydrous AlCl3 by heating :
    Al2O3 with Cl2 gas
    Al2O3 with HCl gas
    Al2O3 with NaCl in solid state
    A mixture of Al2O3 and Carbon in dry Cl2 gas
  • Which one of the following is the correct statement :
    B2H6. 2NH3 is known as inorganic benzene.
    Boric acid is a protonic acic.
    Beryllium exhibits co-ordination number of six.
    Chlorides of both berylium and aluminium have bridged chloride structure in solid phase.
  • Shape and hybridization of BF3 is :
    linear, sp
    planar, sp2
    tetrahedral, sp3
    pyrimidal, sp3
  • Reason for the formation of addition product between NH3 and BF3 is :
    formation of H-bond between them
    formation of ionic bond between them
    formation of covalent bond between them
    similar structure
  • Dry ice is :
    solid ice without water
    solid sulphur dioxide
    solid carbon dioxide
    solid benzene
  • Which halide does not dissociate by water :
    CCl4
    SICl4
    GeCl4
    SnCl4
  • Whose important constituent is silicon :
    chlorophyll
    haemoglobin
    rocks
    amalgam
  • Silicones are used :
    in the preparation of water proof cloth
    in the preparation of insulating material
    in preparing high elastic rubber
    all the above