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  1. The correct sequence of increasing covalent character is represented by
  2. What is the value of carbonate hardness of water sample if 100 mL of it took
  3. Which of the following will not displace hydrogen
  4. Dinitrogen and dioxygen are main constituents of air but these do not react
  5. Borax is used as a cleansing agent because on dissolving in water it gives