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A) It will react with water to form acetylene.
B) It is used in the preparation of glass which can be used at high temperature.
C) It is the hardest known substance.
D) It is a naturally occurring mineral source of silicon.
E) It is used for cutting, grinding, and polishing metals and glasses.
F) A) and E)
G) B) and C)
G) B) and C)
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