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IELTS Practice Reading: Label Diagram ID: #56230 Easy The silver nitrate
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By the end of the 17th century mirrors were made in Britain and the manufacture of mirrors developed subsequently into an important industry in many other European countries. People wore them in their hats, or set them like jewels in their rings. Society glittered and shone like the firmament. A little later on, America was gripped by the mirror craze, only this time they wore interested in larger mirrors. In house after house in residential districts and eastern cities there could be found one long mirror after another placed between two front parlour windows.

In the manufacture of mirrors today, plate glass is cut to size, and all blemishes are removed by polishing with rouge. The glass is scrubbed and flushed with a reducing solution before silver is applied. The glass is then placed on a hollow, cast-iron tabletop, covered with felt, and kept warm by steam. A solution of silver nitrate is poured on the glass and left undisturbed for about 1 hour. The silver nitrate is reduced to a metallic silver and a lustrous deposit of silver gradually forms. The deposit is dried, coated with shellac, and painted. Most present-day mirrors therefore, are made up of these layers. Glass is used on top because it is smooth, clear, and protects the reflective surface. A mirror needs to be very smooth in order for the best reflection to occur.

4 labels
Diagram
Options:
rouge
cast iron
felt
steam
shellac
glass
metal
silver nitrate paint
reducing solution
AI explanationShows the answer. Tap to open.

Question Focus: The diagram shows the top layer of the mirror. We need to find what material is used on top.

Correct Answer: F

Why this is correct: The diagram is asking about the top layer of the mirror. The passage clearly says glass is used on top to protect the reflective surface. So the answer is glass.

Passage Reference: Most present-day mirrors therefore, are made up of these layers. Glass is used on top because it is smooth, clear, and protects the reflective surface.

Common Mistake: Some students choose metal because mirrors reflect. But the passage explains that metal is underneath, not on top. This is a context shift trap.

Paraphrasing: Passage: 'Glass is used on top' = Diagram: 'top layer of the mirror'

Tips: When a diagram shows layers, always check which one is on top and which ones are underneath.

Key Vocabulary:

  • reflective surface = shiny layer
  • protects = keeps safe

Question Focus: The diagram label shows the substance poured onto the glass to create the reflective layer.

Correct Answer: H

Passage Reference: A solution of silver nitrate is poured on the glass and left undisturbed for about 1 hour. The silver nitrate is reduced to a metallic silver and a lustrous deposit of silver gradually forms.

Why this is correct: The diagram shows the liquid added to the glass to make it reflective. The passage says a solution of silver nitrate is poured on the glass, which later forms the silver layer. This matches silver nitrate paint.

Common Mistake: Students often choose metal because silver is metal. But the diagram asks for what is applied, not what it becomes later. This is a process confusion trap.

Paraphrasing: Passage: 'solution of silver nitrate is poured' = Diagram: 'silver nitrate paint'

Tips: In process diagrams, be careful about stages. What is added first may change later.

Key Vocabulary:

  • solution = liquid mixture
  • deposit = layer that forms

Question Focus: The diagram shows the coating added after the silver layer dries.

Correct Answer: E

Passage Reference: The deposit is dried, coated with shellac, and painted.

Why this is correct: The diagram refers to the layer added after drying. The passage clearly says the deposit is coated with shellac. So the correct answer is shellac.

Common Mistake: Some students choose paint because painting is mentioned. But paint comes after shellac. This is a wrong sequence trap.

Paraphrasing: Passage: 'coated with shellac' = Diagram: 'protective coating'

Tips: Watch time words like 'then' and 'after'. They tell you the exact order.

Key Vocabulary:

  • coated = covered
  • deposit = layer

Question Focus: The diagram label shows the liquid used to clean the glass before silver is applied.

Correct Answer: I

Passage Reference: The glass is scrubbed and flushed with a reducing solution before silver is applied.

Why this is correct: The diagram asks about what happens before silver is added. The passage says the glass is flushed with a reducing solution before silver is applied. So the answer is reducing solution.

Common Mistake: Students sometimes choose rouge because polishing is mentioned. But rouge is used earlier for polishing, not for flushing. This is a wrong section trap.

Paraphrasing: Passage: 'flushed with a reducing solution' = Diagram: 'cleaning liquid before silver'

Tips: For diagrams, always match the step to the correct sentence in the passage.

Key Vocabulary:

  • flushed = washed
  • reducing = chemical cleaning

General Tips:

  • Diagram labels usually follow the passage order. Use the previous answer to find the next one.
  • Look for time words like 'before', 'then', and 'after' to understand the sequence.
  • Do not guess based on your own knowledge. Use only what the passage says.
  • Cross out each option as you use it so you do not reuse the same word.

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