Question

Non-oxide ceramics can be

• A. $\ce{B4C}$
• B. SiC
• C. $\ce{Si3N4}$
• D. All of these

Answer 1

Answer: (D)

All of these

Answer 2

Ceramics are inorganic , non-metallic, solid minerals. They come in a variety of forms, including silicates (silica, ${SiO2}$ with metal oxides), oxides (oxygen and metals), carbides (carbon and metals), aluminates (alumina, ${Al2O3}$ with metal oxides) and nitrides. The given ceramics are ${B4C}$ (carbides), SiC (carbides), ${Si3N4}$ (nitrides) and thus, none of these is an oxide . All of these are nonoxide ceramics.