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In which of the following reactins heter...

In which of the following reactins heterogenous catalysis is involved ?
`(i) 2SO_(2) (g) + O_(2) (g) overset(NO (g))to2SO_(3) (g)`
`(ii) 2SO_(2) (g) overset(P (s)) to 2SO_(3) (g)`
(iii) `N _(2)(g) + 3H_(2) (g) overset(Fe (s))to 2NH_(3) (g)`
(iv) `CH_(3) COOCH_(3) (l) + H _(2) O (l) overset(HCl(l))to CH_(3) COOH (aq) + CH_(3) OH (aq)`

A

`(ii),(iii)`

B

`(ii), (iii),(iv)`

C

`(i),(ii),(iii)`

D

`(iv)`

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A
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