Introduction of two drops of concentrated sulphuric acid, ${\mathrm{H}}_2{\mathrm{SO}}_4$ , speeds up an esterification reaction .Introduction of a piece of platinum metal, $\mathrm{Pt}$, speeds up the reaction of ${\mathrm{H}}_2$and ${\mathrm{O}}_2$ gas. Which of the following statements is true?

In order to hydrogenate nitro groups, heterogeneous metal catalysts with a $\mathrm{Pt}$base are frequently employed.

To speed up the reaction, both homogeneous and heterogeneous catalysts are employed. a uniform catalyst, like sulfuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$