Neco 2018 Chemistry Question 30

Practice objective / multiple choice question 30 from the 2018 Neco Chemistry examination.

Neco 2018 Chemistry Objective / Multiple Choice Hard Difficulty
Question 30 NECO • 2018 • CHEMISTRY • objective

In an electrolytic cell, a solution of CuSO\(_4\) is electrolyzed using inert electrodes. A constant current of 2.00\,A is passed for 30\,minutes, and the mass of copper deposited on the cathode is found to be 0.56\,g.\n\n(a) Calculate the current efficiency of the copper deposition.\n\n(b) If the same cell is used with an AgNO\(_3\) solution under identical conditions, what mass of silver would be deposited on the cathode, assuming the same current efficiency?

Answer Options

A. Current efficiency = 47.3 %; mass of Ag = 2.10 g
B. Current efficiency = 40.0 %; mass of Ag = 1.60 g
Correct Answer C. Current efficiency = 47.3 %; mass of Ag = 1.90 g
D. Current efficiency = 55.0 %; mass of Ag = 2.20 g
Correct Answer
C
Correct Option:
Current efficiency = 47.3 %; mass of Ag = 1.90 g

About This Question

This is Neco 2018 Chemistry Question 30. It is one of the objective questions from the 2018 Neco Chemistry examination.

Difficulty level: Hard .

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