41. The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol.
42. True vapour pressure of a petroleum fraction __________ Reid vapour pressure.
43. Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely mis-cible. It means that the aniline point of the diesel is __________ the room temperature.
44. Octane numbers of motor gasoline used in India and America are respectively
45. Which is the most effective catalyst used in catalytic cracking of petroleum products?
46. Glycol added to petrol acts as a/an __________ agent.
47. Alkylation
48. Which of the following has the highest viscosity of all (at a given temperature)?
49. Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline.
50. Which of the following is used as a solvent in deasphalting of petroleum products?
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