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  1. Green chemistry means such reaction which
  2. Reaction BaO₂(s) ⇌ BaO(s) + O₂(g) ; ΔH = +ve.In equilibrium condition,
  3. At room temperature the solid compound is
  4. Azeotropic mixture of HCl and H₂O has
  5. The wavelength correspending to maximum enregy for hydrogen is 91.2 nm