211. Petroleum is believed to have originated from __________ sources. September 7, 2025 by Admin vegetable animal both (a) and (b) neither (a) nor (b) ✅ The correct answer is option C.
212. Petroleum September 7, 2025 by Admin is optically active. constitutes mainly of olefins. does not contain asphalt. does not contain aromatics. ✅ The correct answer is option A.
213. The coking process normally mostly used in Indian oil refineries is the __________ coking process. September 7, 2025 by Admin delayed flexi fluid contact ✅ The correct answer is option A.
214. The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. September 7, 2025 by Admin 3 300 3000 1000 ✅ The correct answer is option A.
215. Catalyst used in the catalytic cracking is September 7, 2025 by Admin silica-alumina silica gel vanadium pentoxide nickel ✅ The correct answer is option A.
216. The octane number of aviation gasoline may be September 7, 2025 by Admin 79 87 97 >100 ✅ The correct answer is option D.
217. Feedstock for polymerisation is September 7, 2025 by Admin naphtha. cracked gases rich in C2 & C4 olefins. low boiling aromatics. none of these. ✅ The correct answer is option B.
218. Pyrolysis of kerosene or natural gasoline is done to produce mainly the September 7, 2025 by Admin olefins and aromatics lighter paraffins stabilised gasoline diesel ✅ The correct answer is option A.
219. Percentage of straight run gasoline in a typical crude oil may be around September 7, 2025 by Admin 6 18 38 52 ✅ The correct answer is option D.
220. Cetane number of alpha methyl naphthalene is assumed to be September 7, 2025 by Admin 0 100 50 ∞ ✅ The correct answer is option A.