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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
  • Rutherfords alpha particle scattering experiment proved that an atom contains :
    Neutron
    Proton
    Electron
    Nuceus
  • Which of the following does not have same number of neutrons as in 18Ar40 :
    21Sc43
    21Sc40
    19K41
    20Ca42
  • Maximum number of electrons present in the outermost shell of Argon is :
    2
    4
    6
    8
  • The nature of anode rays depends upon :
    Nature of emission tube
    Nature of the remaining gas
    Electrode
    All the above
  • The mass of positron will be equal to :
    Neutron
    Proton
    Electron
    None of the above
  • Number of electrons in Cl- ion will be
    19
    18
    17
    2
  • An element has atomic number 18 and atomic mass 40. number of neutrons in the nucleus of atom of ele
    40
    18
    58
    22
  • Neutron was discovered by :
    Chadwick
    Rutherford
    Moseley
    J.J. Thompson
  • Which element has maximum number of unpaired electrons?(atomic no. of Ti=22, V=23, Cr=24, Fe=26)
    Ti
    V
    Cr
    Fe
  • magnetic quantum number explains:
    size of orbitals
    shape of orbitals
    orientation of orbitals
    nuclear orientation