Gce Model Questions Vol1 2023 Chemistry Question 2

Practice objective / multiple choice question 2 from the 2023 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2023 Chemistry Objective / Multiple Choice Hard Difficulty

Question 2 GCE_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • objective

A copper pipe of length \(2.00\) m and internal diameter \(20\) mm is immersed in seawater and corrodes uniformly. After six months the measured mass loss is \(0.85\) g. Assuming the corrosion reaction is \(\text{Cu} \rightarrow \text{Cu}^{2+} + 2e^{-}\), calculate the average corrosion current density in \(\text{A cm}^{-2}\). (Take \(M_{Cu}=63.55\) g·mol⁻¹, \(F=96485\) C·mol⁻¹, and 1 month = 30.44 days.)

Answer Options

Correct Answer A. 1.3×10⁻⁷ A cm⁻²

B. 2.6×10⁻⁷ A cm⁻²

C. 1.3×10⁻⁶ A cm⁻²

D. 9.5×10⁻⁸ A cm⁻²

Correct Answer

Correct Option:

1.3×10⁻⁷ A cm⁻²

About This Question

This is Gce Model Questions Vol1 2023 Chemistry Question 2. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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