Subject

chemistry

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  • 1 Empirical formula of an organic compound is CH₂O. if vapour density of the compound is 30, its
    CH2O
    C3H6O3
    C2H4O2
    C2H4O3
  • 2 atomic mass means :
    mass of one atom of an element is gm
    mass of one atom of an element /1/12 part of mass
    mass of 1 atom of an element/mass of 1atom of hyd
    mass of 1 atom of an element in mg.
  • 3 1mole numerically equles to :
    3.0*101
    60.02*1023
    6.23*1023
    6.02*1010
  • 4 magnetic quantum number explains:
    size of orbitals
    shape of orbitals
    orientation of orbitals
    nuclear orientation
  • 5 Which element has maximum number of unpaired electrons?(atomic no. of Ti=22, V=23, Cr=24, Fe=26)
    Ti
    V
    Cr
    Fe