(i) Zeolites are shape selective catalysts having honey comb like structure.
(ii)The reactions taking place in zeolites depend upon the size and shape of the reactant and product molecules as well as upon the pores and cavities of the zeolites.
(iii)Zeolites are widely used as catalysts in petrochemical industries for cracking of hydrocarbons and isomerisation.They are also used for removing permanent hardness of water.