In the manufacture of $H_2SO_4$,platinized asbestos is used as a catalyst. This is an example of.......

In the oxidation of oxalic acid by $KMnO_4$,the color of $KMnO_4$ disappears slowly at the beginning of the reaction,but then it disappears very rapidly. This is an example of .......

How is Raney nickel,which is used as a catalyst,prepared?

Regarding criteria of catalysis,which one of the following statements is not true?

Considering catalysis,which of the following statements is incorrect?

What is the role of adsorption in heterogeneous catalysis?