Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
(a) Addition reaction
(b) Substitution reaction
(c) Displacement reaction
(d) Oxidation reaction
Answer: (a)
Solution:
Oils are unsaturated compounds containing double bonds. Unsaturated compounds are the only one which can undergo addition reaction.
The reducing agents palladium or nickel add hydrogen to the oil, which is an addition reaction. This process is also known as hydrogenation of oils. For example:
Hydrogenation reactions are addition reactions.
Therefore, option (a) is correct.