Question detail
What is produced at the cathode during the electrolysis of an aqueous solution if the metal is more reactive than hydrogen?
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. Hydrogen gas
- B. The metal
- C. Oxygen gas
- D. Hydroxide ions
Answer
Hydrogen gas
Explanation
If the metal is more reactive than hydrogen, hydrogen gas is produced at the cathode during electrolysis.
Common mistake
Confusing Ions in Aqueous Solutions
Students often forget that aqueous solutions contain not only ions from the ionic compound but also hydrogen ions and hydroxide ions from water.
To fix this, remember to include all types of ions present in the solution when describing aqueous electrolysis, specifically noting the contribution of water.
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