Question detail
What is the purpose of alloying gold with metals like silver or copper?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using materials
Question
- A. To change its color and improve hardness
- B. To reduce its cost significantly
- C. To make it more malleable
- D. To enhance its thermal conductivity
Answer
The correct option is To change its color and improve hardness. This answer is correct because it matches the approved learning objective to describe gold jewellery as usually containing gold alloyed with metals such as silver, copper or zinc. (Chemistry only) in the subtopic Alloys as useful materials.
Explanation
The correct option is To change its color and improve hardness. To change its color and improve hardness is correct because it directly supports the approved learning objective to describe gold jewellery as usually containing gold alloyed with metals such as silver, copper or zinc. (Chemistry only). This belongs to the subtopic Alloys as useful materials within Using materials, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Alloys as useful materials.
Common mistake
Common Mistake in Gold Alloys
Students often state that gold jewellery is made of pure gold without mentioning that it is usually alloyed with other metals.
Emphasize that gold jewellery typically contains gold alloyed with metals such as silver, copper, or zinc to enhance its properties.
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