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  1. As the alkaline earth metals (except Be) tend to lose their valence electrons
  2. Equal masses of H₂, O₂ and methane have been taken in a container of volume
  3. When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat
  4. Among the following the paramagnetic one is
  5. What is formed when hydrogen atom of the -OH group in phenol is replaced by