Preparation of vegetable ghee involves_________________?
Correct answer: C. hydrogenation
- A. halogenation
- B. hydroxylation
- C. hydrogenation
- D. hydration
Explanation
Vegetable oils contain unsaturated carbon-carbon bonds, and hydrogenation adds H2 across these bonds in the presence of a catalyst such as nickel, converting the oil into semi-solid vegetable ghee. The common mistake is choosing hydration, which adds H2O and forms alcohols rather than reducing unsaturation.
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About Alkenes
Alkenes are unsaturated hydrocarbons containing a carbon-carbon double bond with sigma and pi components and restricted rotation. Their reactions include electrophilic addition of hydrogen, halogens, hydrogen halides and water, with Markovnikov orientation, oxidation, combustion and polymerisation, while their preparation commonly involves elimination from alkyl halides or alcohols.
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