The conversion of pig iron to steel frequentl | vedclass

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(B) Pig iron contains a high percentage of carbon $(3-4.5\%)$ and other impurities like $S, P, Si, Mn$. To convert pig iron into steel,these impuritie

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$I, II$

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(B) Pig iron contains a high percentage of carbon $(3-4.5\%)$ and other impurities like $S, P, Si, Mn$. To convert pig iron into steel,these impurities must be removed or reduced. $(I)$ Oxygen or iron oxide is added to oxidize the impurities (like $C$ to $CO$,$Si$ to $SiO_2$,etc.). $(II)$ Transition elements (like $Cr, Ni, Mn, V, W$) are added to impart specific properties such as hardness,corrosion resistance,and tensile strength to the steel. $(III)$ Inner transition elements are generally not added for this purpose. $(IV)$ Silica is an acidic impurity that is usually removed by adding a basic flux,not added to the steel. Therefore,the correct additions are $(I)$ and $(II)$.

List-$I$ (Aquated Ion)	List-$II$ (Colour)
$A. Ni^{2+}$	$I. \text{Violet}$
$B. Fe^{3+}$	$II. \text{Blue}$
$C. Mn^{3+}$	$III. \text{Yellow}$
$D. V^{4+}$	$IV. \text{Red}$
	$V. \text{Green}$

The conversion of pig iron to steel frequently requires the addition of
$(I)$ oxygen or iron oxide
$(II)$ transition elements
$(III)$ inner transition elements
$(IV)$ silica

Similar Questions

Match the following:

List-$I$ (Aquated Ion) List-$II$ (Colour)

$A. Ni^{2+}$ $I. \text{Violet}$

$B. Fe^{3+}$ $II. \text{Blue}$

$C. Mn^{3+}$ $III. \text{Yellow}$

$D. V^{4+}$ $IV. \text{Red}$

$V. \text{Green}$

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Which of the following ions is green in colour?

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The conversion of pig iron to steel frequently requires the addition of $(I)$ oxygen or iron oxide$(II)$ transition elements$(III)$ inner transition elements$(IV)$ silica