1.

Consider the following orders (I) MgOgtAl_(2)O_(3)gtCr_(2)O_(3)gtFe_(2)O_(3) (Thermal stability) (II)CaOgtMgOgtZnO gtPbO (Temperature at which reduction by carbon takes place at least theoretically) (III) Cr_(2)O_(3)gtFe_(2)O_(3)gtMgO (Temperature at which reduction by Al takes place)

Answer»

II,III
I,III
I,II
None of these

Answer :C


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