What do you mean by activity and selectivity of catalysts ?

1.	What do you mean by activity and selectivity of catalysts ?
Answer» Activity: Activity of a catalyst refers to the ability of a catalyst to increase the rate of chemical reaction. For example : H₂ and O₂ presence of platinum react to form water explosively. 2H₂ + O₂ + Pt → 2H₂O Selectivity: Selectivity of a catalyst is its ability to speed up a reaction to yield a particular product. For example : CO + H₂ combine to form CH₄ when Ni is the catalyst and methanol when Cr₂O₂ is catalyst. CO(g) + H₂ → HCHO(g)

Answer»

Activity: Activity of a catalyst refers to the ability of a catalyst to increase the rate of chemical reaction.

For example : H₂ and O₂ presence of platinum react to form water explosively.

2H₂ + O₂ + Pt → 2H₂O

Selectivity: Selectivity of a catalyst is its ability to speed up a reaction to yield a particular product.

For example : CO + H₂ combine to form CH₄ when Ni is the catalyst and methanol when Cr₂O₂ is catalyst.

CO(g) + H₂ → HCHO(g)

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