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(C) Manganese is added to steel to produce manganese steel,which is extremely hard and resistant to wear. In the metallurgical process,manganese acts

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can remove oxygen and sulphur

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(C) Manganese is added to steel to produce manganese steel,which is extremely hard and resistant to wear. In the metallurgical process,manganese acts as a deoxidizer and desulfurizer. It reacts with oxygen and sulfur impurities present in the molten steel to form manganese oxide $(MnO)$ and manganese sulfide $(MnS)$,which are then removed as slag. This purification process significantly improves the mechanical properties of the steel,making it ideal for heavy-duty applications like railroad rails.

Column-$I$	Column-$II$
$A$. $Pb_3O_4$	$I$. Neutral oxide
$B$. $N_2O$	$II$. Acidic oxide
$C$. $Mn_2O_7$	$III$. Basic oxide
$D$. $Bi_2O_3$	$IV$. Mixed oxide

Addition of high proportions of manganese makes steel useful in making rails of railroads,because manganese

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Match the formulas given in Column-$I$ with the type of oxide given in Column-$II$ and select the correct option:-

Column-$I$ Column-$II$

$A$. $Pb_3O_4$ $I$. Neutral oxide

$B$. $N_2O$ $II$. Acidic oxide

$C$. $Mn_2O_7$ $III$. Basic oxide

$D$. $Bi_2O_3$ $IV$. Mixed oxide

Transition elements with lower oxidation states act as........

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