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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
  • Electron affinity of noble gases is :
    Low
    Approximately Zero
    High
    Highest
  • Which has largest size?
    Al
    Al+
    Al++
    Al+++
  • variable valency is shown by :
    Metallic elements
    normal elements
    Transition elements
    Non-metallic elements
  • Electronegativity in the periodic table on moving from left to right :
    Increases
    Remain constant
    Decreases
    Changes irregularly
  • which not have a unit
    Electronegativity
    Ionisation energy
    Electron affinity
    Excitation potential