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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
  • Element hydrogen can be placed in VII A group, because :
    hydrogen in light
    it has isotopes like D and T
    hydrogen contains only one electron
    it forms a hydride like NaH
  • Total number of neutrons in heavy hydrogen atom is :
    0
    1
    2
    3
  • D2O is used in:
    chemical industries
    manufacture of insecticides
    manufacture of pharmaceuticals
    nuclear reactors
  • IF any isotope of hydrogen has two neutrons then its atomic number and atomic mass are respectively:
    1 and 2
    2 and 1
    1 and 3
    1 and 1
  • In context with the Industrial preparation of hydrogen from water gas. Which of the following is the correct statement :
    CO is removed by adsorption in aqueous Cu2Cl2 solution.
    CO is oxidised to CO2 with steam in the presence of a catalyst followed by absorption of
    H2 is removed through occlusion with Pd
    CO and H2 are fractionally separated using difference in their densities
  • The mixture of following liquids acts as a propeller for rocket:
    H2 + O2
    N2 + O2
    H2 + N2
    H2 + Ar
  • Very pure hydrogen can be made by which of the following processes :
    reaction of salt like hydrides with water
    mixing natural hydrocarbons of high molecular mass
    reaction of methane with steam
    electrolysis of water
  • Which statement is incorrect regarding H2O2 :
    it has to be stored in plastic or wax lined glass bottle in dark
    it has to be kept away from dust
    it can act only as an oxidising agent
    it decomposes on expouse to light
  • Boiling point of H2O is higher than H2S. the reason is :
    Polar Bond
    Hydrogen Bond
    Electrovalent Bond
    Coordinate Bond
  • The lightest gas among the following is :
    Nitrogen
    Helium
    Hydrogen
    Oxygen