Question detail
What is the primary purpose of sodium carbonate in the production of soda-lime glass?
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 increase the melting point of the mixture
- B. To act as a flux to lower the melting temperature
- C. To provide structural strength to the glass
- D. To enhance the color of the glass
Answer
The correct option is To act as a flux to lower the melting temperature. This answer is correct because it matches the approved learning objective to describe soda-lime glass as made by heating sand, sodium carbonate and limestone. (Chemistry only) in the subtopic Ceramics, polymers and composites.
Explanation
The correct option is To act as a flux to lower the melting temperature. To act as a flux to lower the melting temperature is correct because it directly supports the approved learning objective to describe soda-lime glass as made by heating sand, sodium carbonate and limestone. (Chemistry only). This belongs to the subtopic Ceramics, polymers and composites 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 Ceramics, polymers and composites.
Common mistake
Common Misconception about Soda-Lime Glass
Students often think that soda-lime glass is made only from sand without recognizing the role of sodium carbonate and limestone.
Emphasize that soda-lime glass is specifically made by heating a mixture of sand, sodium carbonate, and limestone.
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