Question detail
Which diagram or label choice best matches chemistry only in this Energy changes subtopic?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Chemical cells and fuel cells (chemistry only)
Question
- A. chemistry only: correct Unit 4.5 answer for Fuel cells
- B. Incorrect label: confuses the labelled quantity with activation energy
- C. Incorrect label: places the idea on the wrong part of the reaction or cell model
- D. Incorrect label: uses the product/reactant relationship the wrong way round
Answer
The correct option is chemistry only: correct Unit 4.5 answer for Fuel cells.
Explanation
The correct option is chemistry only: correct Unit 4.5 answer for Fuel cells. It directly supports the approved learning objective to (chemistry only) (HT only) Link hydrogen fuel cell half equations to the overall production of water. This calculation version keeps the answer anchored to Fuel cells within Chemical cells and fuel cells (chemistry only), and avoids mixing energy transfer, reaction profiles, activation energy, chemical cells, fuel cells, exothermic reactions and endothermic reactions unless the objective names them.
Common mistake
Linking Half Equations
Students often confuse the half equations for the hydrogen and oxygen reactions in a hydrogen fuel cell, leading to incorrect overall reactions.
Carefully study the half equations for both the hydrogen and oxygen reactions, ensuring to understand how they combine to produce water.
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