Question

Which one of the following is an example for homogeneous catalysis?

• A. Manufacture of ammonia by Haber's process
• B. Manufacture of sulphuric acid by contact process
• C. Hydrogenation of oil
• D. Hydrolysis of sucrose in presence of dilute hydrochloric acid

Answer 1

Answer: (D)

In homogeneous catalysis, reactants and catalyst are in the same phase.

(a) $SO _{2}(g)+ O _{2}(g) \xrightleftharpoons{ Pt (s)} SO _{3}(g)$

(Contact process)

It is an example of heterogeneous catalysis.

(b) $N _{2}(g)+ H _{2}(g) \xrightleftharpoons { Fe (s)} 2 NH _{3}(g)$

(Haber's process)

It is an example of heterogeneous catalysis.

(c) $C _{12} H _{22} O _{11}(a q)+ H _{2} O (a q) \xrightleftharpoons { HCl (a q)} C _{6} H _{12} O _{6}$

$+ C _{6} H _{12} O _{6}$

It is an example of homogeneous catalysis.

$Oil (l) +H_2(g) \xrightarrow[{Pt(s)}] {(Hardening)}fat$

Thus, it is also an example of heterogeneous catalysis.