Question detail
For Atom economy, which option best supports this Unit 4.3 objective: (chemistry only) Rearrange atom-economy relationships where required. (MS 3b)?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Yield and atom economy of chemical reactions (chemistry only)
Question
- A. 80%
- B. 70%
- C. 90%
- D. 60%
Answer
The answer is 80 %.
Explanation
The correct option is 80%. This uses Percentage Yield because the objective is about (chemistry only) Rearrange atom-economy relationships where required. (MS 3b). The reasoning belongs to Atom economy within Yield and atom economy of chemical reactions (chemistry only), so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term chemistry only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3. The other options are weaker because they either use the wrong formula, the wrong unit, a vague relationship, or the wrong quantitative context.
Common mistake
Common Mistake in Rearranging Atom Economy
Students often confuse the formula for atom economy with that of percentage yield, leading to incorrect rearrangements.
Review the specific formula for atom economy and practice rearranging it separately from percentage yield to reinforce understanding.
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