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WBCS Preliminary Examination 2016 — General Studies · Question 113 of 200

Q113
General ScienceChemistry
In the manufacture of Vanaspati ghee from vegetable oils, which among the following gas is used?
  1. a.Nitrogen
  2. b.Carbon dioxide
  3. c.Hydrogen
  4. d.Neon

Answer: (C) Hydrogen

Vanaspati ghee (partially hydrogenated vegetable oil) is manufactured by passing hydrogen gas through vegetable oils in the presence of a nickel catalyst at high temperature and pressure. This hydrogenation process converts unsaturated liquid oils into semi-solid fats.