Question: The sequence of refractory materials according to increasing melting points is : Dolomite, Magnesia, Bauxite, Chromite Bauxite, Chromite, Dolomite, Magnesia Magnesia, Bauxite, Dolomite, Chromite.

The sequence of refractory materials according to increasing melting points is :
Dolomite, Magnesia, Bauxite, Chromite
Bauxite, Chromite, Dolomite, Magnesia
Magnesia, Bauxite, Dolomite, Chromite.

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