Q. Carborundum is used as an abrasive because

A
has high thermal conductivity
B
has low coefficient of expansion
C
has high chemical stability
D
high stiffness
Solution:

Silicon carbide (SiC), also known as carborundum is a semiconductor containing silicon and carbon. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests.

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