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Question: In which of the following reactions heterogeneous catalysis is involved? (I) \(2 \mathrm { SO } _ {...

In which of the following reactions heterogeneous catalysis is involved?

(I) 2SO2( g)+O2( g)→NO(g)2SO3( g)2 \mathrm { SO } _ { 2 ( \mathrm {~g} ) } + \mathrm { O } _ { 2 ( \mathrm {~g} ) } \xrightarrow { \mathrm { NO } _ { ( \mathrm { g } ) } } 2 \mathrm { SO } _ { 3 ( \mathrm {~g} ) }

(II) 2SO2( g)→Pt(S)2SO3( g)2 \mathrm { SO } _ { 2 ( \mathrm {~g} ) } \xrightarrow { \mathrm { Pt } ( \mathrm { S } ) } 2 \mathrm { SO } _ { 3 ( \mathrm {~g} ) }

(III) N2( g)+3H2( g)→Fe(s)2NH3( g)\mathrm { N } _ { 2 ( \mathrm {~g} ) } + 3 \mathrm { H } _ { 2 ( \mathrm {~g} ) } \xrightarrow { \mathrm { Fe } _ { ( \mathrm { s } ) } } 2 \mathrm { NH } _ { 3 ( \mathrm {~g} ) }

(IV)

A

(II), (III)

B

(II),(III),(IV)

C

(I),(II),(III)

D

(IV)

Answer

(II), (III)

Explanation

Solution

In heterogeneous catalysis, the reactants and the catalyst are in different phases.