Passage Reference: Before adding 5 ml of hydrochloric acid to the funnel

Common Mistake: Students may write hydrochloric acid only, but the diagram label includes the amount. Leaving out 5ml is a partial truth trap.

Paraphrasing: Passage: 'adding 5 ml of hydrochloric acid to the funnel' = Diagram: 'liquid added to funnel'

Tips: For diagram labels, always include numbers if the passage gives a specific amount.

Key Vocabulary:

• hydrochloric acid = a strong acid
• funnel = cone-shaped tool for pouring

Question Focus: Diagram label for the stopper at the top of the cylinder

Correct Answer: cork

Passage Reference: The top of the glass cylinder is fitted with a cork and a thistle funnel and a glass pipe inserted into it.

Why this is correct: The diagram points to the stopper sealing the top of the cylinder. The passage states it is fitted with a cork, so cork is the correct label.

Common Mistake: Students sometimes write lid or cover, but those words are not in the passage. This is a synonym trap.

Paraphrasing: Passage: 'cork' = Diagram: 'stopper on top of cylinder'

Tips: In FIB questions, you must copy the exact word from the passage.

Key Vocabulary:

• cork = stopper
• fitted = put in place

Question Focus: Diagram label for the main container

Correct Answer: 50ml glass cylinder

Passage Reference: 5ml of tap water is put into a 50ml graduated glass cylinder with about 1gm of zinc.

Why this is correct: The diagram points to the main container holding water and zinc. The passage names this as a 50ml graduated glass cylinder, which matches the diagram.

Common Mistake: Students may write only glass cylinder, but the passage includes the size. Missing this detail is a partial truth trap.

Paraphrasing: Passage: '50ml graduated glass cylinder' = Diagram: 'main container'

Tips: When equipment names include measurements, include them if they fit the word limit.

Key Vocabulary:

• graduated = marked with measurements
• cylinder = tube-shaped container

Question Focus: Diagram label for the solid metal inside the cylinder

Correct Answer: 1gm of zinc

Passage Reference: 5ml of tap water is put into a 50ml graduated glass cylinder with about 1gm of zinc.

Why this is correct: The diagram shows a solid at the bottom of the cylinder. The passage says there is 1gm of zinc, so that is the correct label.

Common Mistake: Students sometimes write zinc only, but the amount is shown in the diagram. This is a partial truth trap.

Paraphrasing: Passage: '1gm of zinc' = Diagram: 'metal in cylinder'

Tips: If the diagram shows a measured amount, check the passage for the exact number.

Key Vocabulary:

• zinc = a metal element
• gm = gram

Question Focus: Diagram label for the funnel at the top

Correct Answer: thistle funnel

Passage Reference: All you need is a thistle funnel, cork, glass dish, graduated glass cylinder, test tube, glass pipe, zinc, tap water, and hydrochloric acid.

Why this is correct: The diagram shows a funnel-shaped tool at the top of the setup. The passage lists this as a thistle funnel, which is the exact equipment name.

Common Mistake: Writing just funnel is not enough because the passage specifies the type. This is a partial truth trap.

Paraphrasing: Passage: 'thistle funnel' = Diagram: 'funnel at the top'

Tips: Always copy full equipment names, not shortened versions.

Key Vocabulary:

• thistle funnel = lab funnel with a long tube

Question Focus: Diagram label for the gas produced

Correct Answer: hydrogen gas

Passage Reference: Hydrogen gas is released and starts to travel down the pipe into the test tube.

Why this is correct: The diagram labels the gas moving through the pipe. The passage clearly states hydrogen gas is released, so this is the correct answer.

Common Mistake: Some students write hydrogen only, but the passage uses hydrogen gas. Shortening it is a partial truth trap.

Paraphrasing: Passage: 'hydrogen gas' = Diagram: 'gas in pipe'

Tips: If the passage includes a scientific form like 'gas', include it.

Key Vocabulary:

• released = let out
• gas = state of matter

Question Focus: Diagram label for the container collecting gas

Correct Answer: test tube

Passage Reference: which is then covered with a water filled test tube.

Why this is correct: The diagram points to the upside-down container collecting gas. The passage says it is covered with a test tube, so that label is correct.

Common Mistake: Students may write glass tube, but that refers to a different part. This is a context shift trap.

Paraphrasing: Passage: 'test tube' = Diagram: 'container for gas'

Tips: Be careful not to confuse similar-looking equipment names.

Key Vocabulary:

• covered = placed over
• collect = gather

Question Focus: Diagram label for the liquid in the dish

Correct Answer: tap water

Passage Reference: Sufficient tap water is placed in the dish to cover the top of the pipe

Why this is correct: The diagram shows liquid in the dish around the pipe. The passage says sufficient tap water is placed in the dish, so tap water is correct.

Common Mistake: Writing water only is too general. The passage specifies tap water, so missing this is a partial truth trap.

Paraphrasing: Passage: 'tap water' = Diagram: 'water in dish'

Tips: When a type of water is specified, copy it exactly.

Key Vocabulary:

• sufficient = enough
• dish = shallow container

General Tips:

• Diagram completion answers follow the passage order. Use earlier labels to help you locate later ones.
• Always copy the exact words from the passage. Do not invent synonyms.
• Check the word limit carefully. Extra words make the answer wrong.
• Look closely at the diagram to see if quantities or specific types are shown.