The decomposition of $H_2O_2$ can be slowed down by the addition of a small amount of phosphoric acid,which acts as:

The catalyst used in the hydrogenation of oils is:

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

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.

$A$ catalyst remains unchanged at the end of the reaction regarding

$A$ catalyst is used in a reaction to