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  1. In a metal oxide, there is 20% oxygen by weight. its equivalent weight is
  2. The weight of one molecule of a compound C₆₀H₁₂₂ is
  3. What is the amount of Chlorine evolved,when 2A of current is passed for 30 minutes
  4. In the extraction of aluminium from bauxite, cryolite is used to
  5. A sample of CaCO₃ is 50% pure. On heating 1.12 L of CO₂ at STP is obtained