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CDS II 2017
Question #533
General Science
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Which one of the following types of glasses is used for making optical instruments?
A
Pyrex glass
B
Soft glass
C
Hard glass
D
Flint glass
Pick an option above to test your answer
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Subject:
Science & Technology
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Q: Which one of the following types of glasses is used for making optical instruments?... | CDS II 2017 PYQ | UPSCGPT