Post-UTME Chemistry 2005 Objective — Question 1
Question 1 of 27 from the Post-UTME Screening (Post-UTME) Chemistry 2005 Objective paper, with the correct answer and a full explanation.
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During the electrolysis of copper (II) sulphate solution, an ammeter showed a steady current reading of 1.0A for 1/2 hr. 6.6x10^-4 kg of copper were liberated. Calculate the % error in ammeter reading
- A. 12%
- B. 11%Correct
- C. 1.2%
- D. 1.1%
Explanation
Theoretical mass (using Faraday's laws) is about 5.97x10^-4 kg; comparing to the actual 6.6x10^-4 kg gives an error of approximately 11%.
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