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  1. On electrolysis of dilute H₂SO₄ using plantinum electrodes , the gas evolved at
  2. What is the ratio of mass of an electron to the mass of a proton?
  3. The calorific value of fats,carbohydrates and proteins is in the order of
  4. If 200 mL of gas at 27°C is cooled to 7°C at constant pressure, its final volume will be
  5. The amount of zinc required to produce 224mL of H₂ at STP on treatment with dilute H₂SO₄