Which one of the following is not the example of homogeneous catalysis :- \( \mathrm{P} \) (1) F...

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Which one of the following is not the example of homogeneous catalysis :-
\( \mathrm{P} \)
(1) Formation of \( \mathrm{SO}_{3} \) in the chamber process
W
(2) Formation of \( \mathrm{SO}_{3} \) in the contact process
(3) Hydrolysis of an ester in presence of acid
(4) Decomposition of \( \mathrm{KClO}_{3} \) in presence of \( \mathrm{MnO}_{2} \)
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