Question Focus: Synonym match - the diagram shows the substance added during heating, and the passage names it
Correct Answer: copper oxide powder
Passage Reference: When it is almost boiling, a small quantity of copper oxide powder is added to the beaker.
Why this is correct: The diagram shows the moment when a substance is added to the heated acid. The passage clearly says copper oxide powder is added when the solution is almost boiling, so this exact phrase fits the diagram label.
Common Mistake: Students may write copper oxide only. This loses an important word from the passage and does not exactly copy the text. This is a partial truth trap.
Paraphrasing: Passage: 'a small quantity of copper oxide powder is added' = Diagram: 'material added during heating'
Tips: For diagram labels, copy the full noun phrase from the passage, not a shortened version.
Key Vocabulary:
- oxide = compound with oxygen
- powder = fine solid
Question Focus: Synonym match - the diagram names the stage shown with a filter
Correct Answer: filteration
Passage Reference: The second stage is the filtration stage and, as the name suggests, is where a filter and conical flask are used to remove any copper oxide that has not reacted.
Why this is correct: The diagram shows the second stage using a filter and flask. The passage names this stage as the filtration stage, so the stage name is the correct label.
Common Mistake: Students may write filter because they see the equipment. The diagram is asking for the stage name, not the tool. This is a context shift trap.
Paraphrasing: Passage: 'The second stage is the filtration stage' = Diagram: 'name of stage with filter'
Tips: Check whether the diagram wants the stage name or the object shown.
Key Vocabulary:
- filtration = separating using a filter
Question Focus: Synonym match - the diagram shows the purpose of filtration
Correct Answer: remove copper oxide
Passage Reference: where a filter and conical flask are used to remove any copper oxide that has not reacted.
Why this is correct: This part of the diagram asks what the filtration stage does. The passage explains that filtration is used to remove any copper oxide that has not reacted.
Common Mistake: Students may write clean the solution, which sounds logical but is not written in the passage. You must copy passage words. This is a synonym trap.
Paraphrasing: Passage: 'remove any copper oxide that has not reacted' = Diagram: 'purpose of filtration'
Tips: When a diagram asks what a step does, look for verbs like remove, heat, or concentrate in the passage.
Key Vocabulary:
- remove = take away
- reacted = taken part in a reaction
Question Focus: Synonym match - the diagram shows what remains after filtration
Correct Answer: copper sulphate solution
Passage Reference: A clear copper sulphate solution will be left in the glass dish.
Why this is correct: After filtration, the diagram labels the liquid that is left. The passage says a clear copper sulphate solution will be left, which matches the diagram exactly.
Common Mistake: Students may write copper sulphate only. This misses the word solution, which changes the meaning. This is a partial truth trap.
Paraphrasing: Passage: 'a clear copper sulphate solution will be left' = Diagram: 'liquid remaining after filtration'
Tips: Do not drop important nouns like solution, stage, or powder when copying answers.
Key Vocabulary:
- solution = liquid mixture
Question Focus: Synonym match - the diagram names the final stage
Correct Answer: crystallization
Passage Reference: The final crystallization stage happens when the solution begins to cool and pure copper sulphate crystals start to form
Why this is correct: The diagram shows the last step of the process. The passage clearly names this as the crystallization stage, so that word labels the diagram correctly.
Common Mistake: Students may write cooling because cooling happens here, but cooling is not the stage name. This is a context shift trap.
Paraphrasing: Passage: 'The final crystallization stage happens' = Diagram: 'name of final stage'
Tips: Stage names are often repeated clearly in the passage. Use the exact wording.
Key Vocabulary:
- crystallization = forming crystals
Question Focus: Synonym match - the diagram shows the solid formed at the end
Correct Answer: copper sulphate crystals
Passage Reference: when the solution begins to cool and pure copper sulphate crystals start to form
Why this is correct: The diagram labels the solid produced in the final stage. The passage says pure copper sulphate crystals start to form, so this phrase fits the diagram.
Common Mistake: Students may write crystals only. This is too general and does not fully match the passage. This is a partial truth trap.
Paraphrasing: Passage: 'pure copper sulphate crystals start to form' = Diagram: 'solid produced at the end'
Tips: If the passage gives a specific type of crystal, always include the full name.
Key Vocabulary:
- crystal = solid with regular shape
General Tips:
- Diagram questions follow passage order, so find the first step and move forward step by step.
- Always copy the exact words from the passage. Do not invent your own wording.
- Check the word limit carefully. Longer answers are automatically wrong.
- For process diagrams, look for stage names and results like solution or crystals.
