1.

In which of the following reactions heterogeneous catalysis is involved ? (i)2SO_(2(g))+O_(2(g))overset(NO_((g)))rarr 2SO_(3(g)) (ii) 2SO_(2(g))overset(Pt_(s))rarr 2SO_(3(g)) (iii) N_(2(g))+3H_(2(g))overset(Fe_(s))rarr 2NH_(3(g)) (iv) CH_(3)COOCH_(3(l))+H_(2)O_((l))overset(HCl_((l)))rarr CH_(3)COOH_((aq))+CH_(3)OH_((aq))

Answer»

(ii), (iii) 
(ii), (iii) and (iv) 
(i), (ii) and (iii) 
(iv) 

SOLUTION :The catalysts and the REACTANTS are in DIFFERENT PHASE.


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