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Which of the following statements is wro...

Which of the following statements is wrong?

A

A. smelting is the process where in an oxide is added to concentrated ore to combine with other impurities

B

B. During roasting, reduction of ore into metal must to takes place

C

C. `SiO_(2), P_(2)O_(5)` etc are used as acidic fluxes during smelting.

D

D. FeO, CaO, MnO etc are basic flux used during smelting.

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