Hydrogenation of vegetable oils in the presence of finely divided $Ni$ as a catalyst. The reaction is:

For the conversion of ozone to oxygen in the atmosphere,nitric oxide in the gaseous phase acts as:

Give information about the utility of catalysts in industries.

Identify the catalytic reaction in which both reactants are in different phases.

Which is not a characteristic of a catalyst?

Which is True $(T)$ and False $(F)$ of the following statements?
$1.$ Catalyst forms an activated complex with partial bonds.
$2.$ Catalyst alters the enthalpy change of the reaction.
$3.$ Catalyst remains the same at the initial and end of the reaction.