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Q.
Formation of ammonia from $H_2$ and $N_2$ by Haber’s process using $Fe$ is an example of
Surface Chemistry
Solution:
The catalytic process in which the reactants and the catalyst are in different phases is known as heterogeneous catalysis.
$N_{2(g)} + 3H_{2(g)} \xrightarrow{Fe(s)} 2NH_{3(g)}$
The reactants are in gaseous state while the catalyst is in solid state