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

Vedclass · Accepted Answer

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 $D$.

List-$I$	List-$II$
$I.$ Cyanide process	$a.$ Ultrapure $Ge$
$II.$ Froth floatation process	$b.$ Pine oil
$III.$ Electrolytic reduction	$c.$ Extraction of $Al$
$IV.$ Zone refining	$d.$ Extraction of $Au$

Which of the following statements is not correct?

Similar Questions

Bell metal is an alloy of which of the following?

The advantage$(s)$ of using $O_2$ rather than air in the steel industry is(are):
$(I)$ There is a faster conversion,so a given plant can produce more steel in a day.
$(II)$ Larger quantities can be handled.
$(III)$ It gives a purer product,and the surface is free from nitrides.

Which one of the following statements is incorrect?

The molar mass of the water-insoluble product formed from the fusion of chromite ore $(FeCr_2O_4)$ with $Na_2CO_3$ in the presence of $O_2$ is $..........$ $g \ mol^{-1}$.

Match List-$I$ with List-$II$ and select the correct code.

List-$I$ List-$II$

$I.$ Cyanide process $a.$ Ultrapure $Ge$

$II.$ Froth floatation process $b.$ Pine oil

$III.$ Electrolytic reduction $c.$ Extraction of $Al$

$IV.$ Zone refining $d.$ Extraction of $Au$

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