In which of the following processes is a cata | vedclass

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(B) The $Haber$ process uses iron as a catalyst for the synthesis of ammonia. The $Ostwald$ process uses platinum/rhodium gauze as a catalyst for the

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Thermite process

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(B) The $Haber$ process uses iron as a catalyst for the synthesis of ammonia. The $Ostwald$ process uses platinum/rhodium gauze as a catalyst for the production of nitric acid. The $Contact$ process uses vanadium pentoxide $(V_2O_5)$ as a catalyst for the production of sulfuric acid. The $Thermite$ process is a pyrotechnic composition of metal powder and metal oxide,which produces an exothermic reaction without the use of a catalyst.

Column-$I$	Column-$II$
$A. V_2O_5$	$i. \text{Conversion of } SO_2 \text{ to } SO_3$
$B. Ni$	$ii. \text{Hydrogenation of oils}$
$C. MnO_2$	$iii. \text{Preparation of } O_2 \text{ from } KClO_3$
$D. Fe$	$iv. \text{Haber's process}$

In which of the following processes is a catalyst $NOT$ used?

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