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The electrochemical equivalent of a metal is 3.3 10⁻⁷ ~kg per coulomb. The mass of the metal liberated at the cathode when a 3 A current is passed for 2 seconds will be

Options

  1. A19.8 10⁻⁷ ~kg
  2. B9.9 10⁻⁷ ~kg
  3. C6.6 10⁻⁷ ~kg
  4. D1.1 10⁻⁷ ~kg

Correct answer

A. 19.8 10⁻⁷ ~kg

Step-by-step solution

m = Zit, m =3.3 10⁻⁷ 3 2=19.8 10⁻⁷ ~kg .

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