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  1. Froath floataton proess is used for the concentration of
  2. The process which is catalysed by one of the products is called
  3. If the hydrogen ion concentration of an acid decreases 10 times, its pH value
  4. The energy of second Bhor orbit of the hydrogen atom is -328 kJ mol⁻¹, hence the enregy
  5. Number of σ and π- bonds in acetylene is