TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises: (a) treating the zeolite mordenite with steam at 300-700 degrees C for 2-6 hours in a shallow bed reactor for dealumination, followed by washing with 0.01-2 N of acid solution at 100-110 degrees C for 2-6 hours and further washing with deionized water to remove the extra-framework debris of the zeolite and the nitrate ions; (b) shaping the zeolite catalyst obtained in step (a) by mixing it with an inert alumina binder, with zeolite to binder ratio of 3:1-3:2.5 by weight, followed by adding 2-3 vol.% of glacial acetic acid and allowing the above the mixture for peptization to obtain a homogeneous paste, followed by extrusion, drying at 20-30 degrees C for 10-12 hours and calcination at 500 degrees C for 2-6 hours; and (c) loading the extruded catalyst obtained in step (b) with the noble metal ions by incipient wet impregnation method using platinum tetraammonium chloride and/or palladium chloride as a source of salts, followed by calcination at 500-600 degrees C for 4-6 hours to obtain (I). Preferred Process: The inert alumina binder used in step (b) is pseudo boehmite. The steaming temperature used in step (a) is 350-650 degrees C for 1-4 hours. The ratio of the volume of the support to the acid solution taken in step (a) is 50:50. The acid used in the acid solution is hydrochloric acid, sulfuric acid, nitric acid and/or oxalic acid. The noble metal used in step (c) is platinum and/or palladium. The amount of metal used is 0.1-1 wt.% each metal. The surface area and pore volume of the catalyst material obtained in step (c) is increased by 10-15% and 20-30%, respectively, after the treatment. The acidity of the catalyst obtained is increased to 10-30% after treatment. Preferred Components: The feed stock is olefins (80%) and aromatics (60%). The feed stock used has an octane number of 69 research octane number (RON). EXAMPLE - H-Mordenite zeolites was obtained as support (support-A). Another H-mordenite zeolites was obtained by treating the support A in a shallow bed reactor at 500 degrees C for 3 hours under steam, followed by washing with 2 N of nitric oxide and distilled water. A support B was obtained after the treatment with support. Both the supports are used for making two extrudates, where the support was mixed with pseudo boehmite alumina, and required amount of glacial acetic acid (3 vol.%) was added to obtain a homogeneous paste, which was extruded and dried. The extruded catalyst elements were then impregnated with aqueous solution of tetraammine platinum(II) chloride and palladium (II) nitrate hydrate. The impregnated solid was then dried and calcined to obtain catalyst.