CO(g) and H2(g) react to give different products in the presence of different catalysts. Which ability of the catalyst is shown by these reactions?

CO(g) and H2(g) react to give different products in the presence of different catalysts. Catalyst selectivity is shown by these reactions. Catalyst selectivity is the ability of a catalyst to direct the reaction in such a way so that only one particular product is formed. ZnO and Cr2O3 catalyst is used to prepare methanol from CO(g) and H2(g). In the Fischer-Tropsch process, hydrocarbons are synthesized from CO(g) and H2(g) using Co, ThO2 catalyst.