Activity And Selectivity Of Catalysts

The activity and selectivity of zeolites as catalyst is based on :-

Followin are the serms about ac itivty and selectivity: I. Acitivity is the ability of catalysts to accelerate chemical reactions and selectivity is the ability of catalysts to direct reaction to yield particular products. II. Activity is the ability of catalyst and selectivity is the ability of catalysts to accelerate chemical reactions. Select the correct term :

The temperature at which the catalystic activity of the catalysts is maximum ,is called

Assertion : In the presenced of promote, the activity on the surface of catalyst is enhanced. Reason : Promote increase the surface area of the catalyst and as a result, the number of active centres increase.

Mention one shape selective catalyst used to convert alcohol directly into gasoline .

What do you understand by shape selective catalysis? Why are zeolites good shape selective catalysts?