Gce Model Questions Vol1 2025 Chemistry Question 10

Practice objective / multiple choice question 10 from the 2025 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 10 GCE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

In an electrolytic cell containing molten NaCl, a constant current of 2.00 A is passed for 30.0 min. The current efficiency for Na deposition is 85 %. (a) Calculate the theoretical mass of Na that would be deposited at 100 % efficiency. (b) Find the actual mass deposited. (c) If the remaining charge is used for water electrolysis (2 H₂O → O₂ + 4 H⁺ + 4 e⁻) with 100 % efficiency, determine the volume of H₂ gas produced at STP.

Answer Options

A. (a) 0.857 g; (b) 0.686 g; (c) 0.063 L
Correct Answer B. (a) 0.857 g; (b) 0.728 g; (c) 0.063 L
C. (a) 0.857 g; (b) 0.728 g; (c) 0.067 L
D. (a) 0.900 g; (b) 0.765 g; (c) 0.070 L
Correct Answer
B
Correct Option:
(a) 0.857 g; (b) 0.728 g; (c) 0.063 L

About This Question

This is Gce Model Questions Vol1 2025 Chemistry Question 10. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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