1. [A] Au and Cu Copper and gold are in impure form after extraction. Copper and gold are refined by electrolytic refining method. But, Sodium and potassium are extracted by electrolytic reduction. Metals obtained after electrolytic reduction are in pure form.

    [A] Au and Cu
    Copper and gold are in impure form after extraction. Copper and gold are refined by electrolytic refining method. But, Sodium and potassium are extracted by electrolytic reduction. Metals obtained after electrolytic reduction are in pure form.

    See less
    • 1
  2. the cell division of meristems are faster than the rate of viral multiplication.

    the cell division of meristems are faster than the rate of viral multiplication.

    See less
    • 1