Q. Which glass is used to make spectacles?
A) Potash glass
B) Crook's glass
C) Soda glass
D) Jena glass
✔ Correct Answer: Crook's glass
Exam Insight
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A) Potash glass
B) Crook's glass
C) Soda glass
D) Jena glass
✔ Correct Answer: Crook's glass
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