31. True boiling point apparatus is used for the
32. Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO2 extraction (Edeleanu process), its smoke point may become __________ mm.
33. Smoke point of kerosene expresses its
34. Mercapsol and Unisol processes are meant for the
35. Older crude petroleum
36. Olefins are
37. Which of the following is not a sulphur compound present in petroleum ?
38. The doctor's solution comprises of sodium plumbite in
39. Deoiling is the process of removal of oil from wax. It is done by the __________ process.
40. A good lubricant should have high
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