JAMB Physics 2014 Objective — Question 46
Question 46 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2014 Objective paper, with the correct answer and a full explanation.
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Calculate the mass of the copper deposited during electrolysis when a current of 4A passes through a copper salt for 2 hours. [electrochemical equivalent of copper=3.3×10⁻⁷kgC⁻¹]
- A. 9.5 ×10⁻⁷ kg
- B. 9.5 ×10⁻³ kgCorrect
- C. 2.9 ×10⁻⁴ kg
- D. 2.9 ×10⁵ kg
Explanation
m=zIt=(3.3×10⁻⁷×4×2×3600)kg ≈ 9.5×10⁻³kg.
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