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  1. Which of the following sulphides when heated strongly in air gives the corres
  2. High ionisation energy indicates that
  3. What is the packet of energy called?
  4. A buffer solution contains 0.1 M of acetic acid and 0.1 M of sodium acetate.
  5. A solution with pH = 2 is more acidic then one with a pH = 6 , by a factor