$A$ catalyst is a substance that ......

Identify the role of glycerol in the following reaction: $2 H_2O_{2(\ell)} \xrightarrow{\text{glycerol}} 2 H_2O_{(\ell)} + O_{2(g)}$

Match the catalyst with the process:

Catalyst	Process
$i. Na_{2}O$	$a. \text{Oxidation of } SO_{2} \text{ in the manufacture of } H_{2}SO_{4}$
$ii. TiCl_{4} + Al(CH_{3})_{3}$	$b. \text{Polymerisation of ethylene}$
$iii. PdCl_{2}$	$c. \text{The oxidation of ethyne to ethanal}$
$iv. \text{Nickel complexes}$	$d. \text{Polymerisation of alkynes}$

Which of the following is the correct option?

The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ..........
$A.$ The catalyst is diffused over the surface of reactants.
$B.$ Reactants are adsorbed on the surface of the catalyst.
$C.$ Occurrence of chemical reaction on the catalyst's surface through formation of an intermediate.
$D.$ It is a combination of intermediate compound formation theory and the old adsorption theory.
$E.$ It explains the action of the catalyst as well as those of catalytic promoters and poisons.

What is a reaction called that is catalyzed by one of its products?

Match the following industrial processes in List-$I$ with the catalysts used in List-$II$:

List-$I$ (Industrial process)	List-$II$ (Catalyst used)
$A$. Ostwald's process	$I$. $CuCl_2$
$B$. Haber's process	$II$. Zeolites
$C$. Deacon's process	$III$. $Pt$ gauge
$D$. Cracking of hydrocarbons	$IV$. $Fe$