A) carbon
B) carbon monoxide
C) carbon dioxide
D) calcium carbonate
Correct Answer: A
Solution :
Silica on heating with carbon at high temperature gives carborundum (silicon carbide). \[Si{{O}_{2}}+3C\xrightarrow{\Delta }\underset{\text{Carborundum}}{\mathop{SiC}}\,+2CO\]
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