Which of the following statements is not corr | vedclass

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(D) $1$. Tin stone $(SnO_2)$ is non-magnetic,while wolframite $(FeWO_4 + MnWO_4)$ is magnetic. Electromagnetic separation is used to remove magnetic i

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None of the above

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(D) $1$. Tin stone $(SnO_2)$ is non-magnetic,while wolframite $(FeWO_4 + MnWO_4)$ is magnetic. Electromagnetic separation is used to remove magnetic impurities from non-magnetic ores. Thus,statement $A$ is correct.$2$. In the blast furnace,$CO$ is the primary reducing agent in the upper and middle zones,while $C$ acts as a reducing agent in the lower zone. Thus,statement $B$ is correct.$3$. During the extraction of $Cu$ from $CuFeS_2$,$FeO$ reacts with $SiO_2$ to form $FeSiO_3$ (slag). During the extraction of iron from haematite,$CaO$ (from limestone) reacts with $SiO_2$ to form $CaSiO_3$ (slag). Thus,statement $C$ is correct.$4$. Since all statements $A, B,$ and $C$ are correct,the correct choice is $D$.

Which of the following statements is not correct?

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