Which of the following is an example of homogeneous catalysis reaction?
1) $2{\mathrm{SO}}_{2\left(\mathrm{g}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\stackrel{{\mathrm{NO}}_{\left(\mathrm{g}\right)}}{\to }2{\mathrm{SO}}_{3\left(\mathrm{g}\right)}$
2) Hydrolysis of aqueous sucrose solution in the presence of aqueous mineral acid
3) $2{\mathrm{H}}_2{\mathrm{O}}_{2\left(\mathrm{I}\right)}\stackrel{{\mathrm{Pt}}_{\left(\mathrm{a}\right)}}{\to }2{\mathrm{H}}_{2\left(\mathrm{I}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}$
4) Hydrolysis of liquid ester in the presence of aqueous mineral acid

$1) 2{\mathrm{SO}}_{2\left(\mathrm{g}\right)}+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\stackrel{{\mathrm{NO}}_{\left(\mathrm{g}\right)}}{\to }2{\mathrm{SO}}_{3\left(\mathrm{g}\right)}$
$2) {\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11} (\mathrm{aq}) + {\mathrm{H}}_2\mathrm{O} ( \mathrm{l}) \stackrel{{\mathrm{H}}^{+}(\mathrm{aq}.)}{\to } {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6(\mathrm{aq})+ {\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6(\mathrm{aq})$

$3) {\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5(\mathrm{l})+{\mathrm{H}}_2\mathrm{O}(\mathrm{l})\stackrel{{\mathrm{H}}^{+}(\mathrm{aq}.)\mathrm{or} \mathrm{HCl}\left(\mathrm{l}\right)}{\to } {\mathrm{CH}}_3\mathrm{COOH}(\mathrm{aq})+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}(\mathrm{aq})$

In these three,  all the components involved in an equation are in same physical state and are known as homogeneous catalysis reactions.