1.

Platinum is not used as a catalyst in the :

Answer»

Oxidation of `CH_3OH` to `HCHO`
Oxidation of `SO_2` to `SO_3`
COMBINATION of `H_2` and `I_2` to FORM `HI`
Synthesis of `NH_3` from `N_2` and `H_2`

Answer :D


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