The catalyst used in the hydrogenation of oils is

Which of the following is not an example of homogeneous catalysis?

The role of a catalyst is to change $ . . . . . . $.

What is the role of a catalyst in a chemical reaction?

Describe how the enthalpy of reaction remains unchanged when a catalyst is used in the reaction.

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.