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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
  • the Molecular formula of sulphur is :
    S2
    S4
    S6
    S8
  • the ion formed by the action of nitrous acid and H2O2 :
    Nitronium ion
    Nitrosodium ion
    Nitrate ion
    None of the above
  • Important method of nitrogen fixation is :
    Fraish process
    Solwe Process
    Haber process
    Fisher Trophs process
  • Aqua regia is a mixture of following:
    3HCl+HNO3
    H3PO4+H2SO4
    3HNO3+HCl
    HCl+CH3COOH
  • Alkali metal which directly forms nitride on reacting with nitrogen:
    Na
    K
    Li
    Rb
  • Zinc gives on reacting with very dil. HNO3:
    NO
    NH4NO3
    NO2
    H2
  • On mixing two colorless gases deep brown colored gas is obtained. these gases are:
    NO2, O2
    N2O,NO
    NO, O2
    NH3, HCl
  • in which compound the oxidation state of nitrogen is -1:
    N2O
    NO2
    NH2OH
    N2H4
  • Structure of ammonia is :
    Tetrahedral
    Trigonal
    Trigonal bypyramidal
    pyramidal
  • Ammonia is dried by :
    Conc H2SO4
    Calcium chloride
    Quick lime
    Phosphorus penta chloride