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  1. If 200 mL of gas at 27°C is cooled to 7°C at constant pressure, its final volume will be
  2. Activated charcoal is used to remove colouring matter from pure substances.
  3. In the electrolysis of aqueous solution of CuSO₄ using copper electrodes, the
  4. In Kjeldahl’s method,ammonia from 5g of food neutralizes 30 cm3 of 0.1 N acid.
  5. Which of the following trivalent ion has the largest atomic radii