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  1. The molecular weight of a gas is 45. Its density at STP is
  2. Which does not exist
  3. Specific conductance of 0.1 M sodium chloride solution is 1.06 ˣ 10⁻²
  4. On electrolysis of dilute H₂SO₄ using plantinum electrodes , the gas evolved at
  5. The base present in DNA, but not RNA is