Question detail
What is produced at the cathode during the electrolysis of molten lead bromide?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Electrolysis
Question
- A. Bromine gas
- B. Lead metal
- C. Oxygen gas
- D. Hydrogen gas
Answer
Lead metal
Explanation
During the electrolysis of molten lead bromide, lead ions gain electrons at the cathode to form lead metal.
Common mistake
Misunderstanding Electrolysis Products
Students often predict that the metal will always be produced at the cathode during electrolysis of aqueous solutions, regardless of the metal's reactivity compared to hydrogen.
Students should remember that if the metal is more reactive than hydrogen, hydrogen will be produced at the cathode instead. It's important to refer to the reactivity series when making predictions.
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