The efficiency of a catalyst depends on which of the following?

In this reaction,dilute $H_2SO_4$ is called
$\underset{\text{Sucrose}}{\mathop{C_{12}H_{22}O_{11}}}+H_2O$ $\xrightarrow{dil. H_2SO_4}\underset{\text{Fructose}}{\mathop{C_6H_{12}O_{6(aq)}}}+\underset{\text{Glucose}}{\mathop{C_6H_{12}O_{6(aq)}}}$

What role does adsorption play in heterogeneous catalysis?

Which of the following catalysts is used in the contact process for the industrial production of sulfuric acid from $SO_2$ and $O_2$ (air)?

Which of the following kinds of catalysis can be explained by the adsorption theory?

In the oxidation of oxalic acid by $KMnO_4$,the color of $KMnO_4$ disappears slowly at the start of the reaction but disappears very fast afterwards. This is an example of: