A) \[Si{{O}_{2}}\]
B) \[CaO\]
C) \[CaO\] and \[MgO\]
D) \[F{{e}_{2}}{{O}_{3}}\]
Correct Answer: C
Solution :
CaO and MgO are refractory materials. They have very high melting point.You need to login to perform this action.
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