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(D) In the contact process for the manufacture of sulfuric acid $(H_2SO_4)$, the sulfur dioxide $(SO_2)$ gas obtained from burning sulfur or roasting

Vedclass · Accepted Answer

$Fe_2O_3 \cdot xH_2O$

Vedclass · Answer

(D) In the contact process for the manufacture of sulfuric acid $(H_2SO_4)$, the sulfur dioxide $(SO_2)$ gas obtained from burning sulfur or roasting sulfide ores contains impurities like arsenic compounds.These impurities act as catalytic poisons for the platinum catalyst used in the converter.To remove these arsenic impurities, an arsenic purifier is used.The arsenic purifier contains ferric oxide $(Fe_2O_3 \cdot xH_2O)$, which effectively adsorbs the arsenic impurities from the gas stream.

List-$I$ (Reaction)	List-$II$ (Catalyst)
$A$. Hydrogenation of vegetable oils	$I$. $Ni$
$B$. Decomposition of potassium chlorate	$II$. $MnO_2$
$C$. Oxidation of $SO_2$ in lead chamber process	$III$. $Pt$
$D$. Oxidation of ammonia in Ostwald's process	$IV$. $NO_{(g)}$

In the contact process for the manufacture of $H_2SO_4$, the arsenic purifier used in the industrial plant contains:

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