Question
Which of the following is an example of heterogeneous catalysis ?
A.
\[4N{{H}_{3}}+5{{O}_{2}}\xrightarrow{Pt}4NO+6{{H}_{2}}O\]
B.
\[2S{{O}_{2}}+{{O}_{2}}\xrightarrow{NO}2S{{O}_{3}}\]
C.
\[C{{H}_{3}}COOC{{H}_{3}}+{{H}_{2}}O\xrightarrow{HCl}\] \[C{{H}_{3}}COOH+C{{H}_{3}}OH\]
D.
\[{{C}_{12}}{{H}_{22}}{{O}_{11}}+{{H}_{2}}O\xrightarrow{{{H}_{2}}S{{O}_{4}}}\] \[{{C}_{6}}{{H}_{12}}{{O}_{6}}+{{C}_{6}}{{H}_{12}}{{O}_{6}}\]
Answer :
\[4N{{H}_{3}}+5{{O}_{2}}\xrightarrow{Pt}4NO+6{{H}_{2}}O\]
Solution :
This is an example of heterogeneous catalysis as the catalyst is present in different phase than that of the reactants.
\[4N{{H}_{3\left( g \right)}}+5{{O}_{2\left( g \right)}}\xrightarrow{P{{t}_{\left( s \right)}}}\] \[4N{{O}_{\left( g \right)}}+6{{H}_{2}}{{O}_{\left( g \right)}}\]