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  1. If a 0.00001 M solution of HCl is diluted thousand folds the pH of the resulting
  2. The electronic configuration of chalcogens is
  3. The difference between ΔH and ΔE at 300 K for the reaction
  4. A compound,containing only carbon,hydrogen and oxygen,has a molecular weight
  5. 0.45 g acid of molecular weight 90 was neutralise by 20 mL of 0.5 N KOH