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JAMB Chemistry 1986 Question 16

Question 16

Electrolysis

How many coulombs of electricity are passed through a solution in which 6.5 amperes are allowed to run for 1.0 hour?

  1. A.3.90 × 102 coulombs
  2. B.5.50 × 103 coulombs
  3. C.6.54 × 103 coulombs
  4. D.2.34 × 104 coulombs
Show the answer and explanation

Answer: D (2.34 × 104 coulombs)

Explanation

Quantity of electricity = current × time in seconds = 6.5 A × 3600 s = 23400 C, that is 2.34 × 104 coulombs.