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JAMB Physics 1983 Question 26

Question 26

Conduction through Liquids and Gases

The electrochemical equivalent of a metal is 0.126 × 10−6 kg/C. The mass of the metal that a current of 5 A will deposit from a suitable bath in 1 hour is

  1. A.0.0378 × 10−3 kg
  2. B.0.227 × 10−3 kg
  3. C.0.378 × 10−3 kg
  4. D.0.595 × 10−3 kg
  5. E.2.268 × 10−3 kg.
Show the answer and explanation

Answer: E (2.268 × 10−3 kg.)

Explanation

m = zIt = 0.126 × 10−6 × 5 × 3600 = 2.268 × 10−3 kg.