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Fats are made from edible oils using the process of:

HPPSC · 2022 · GS1
Question:
Fats are made from edible oils using the process of:

Options

(1) Saponification
(2) Esterification
(3) Catalytic hydrogenation
(4) Hydrogenation
Answer: (3) Catalytic hydrogenation

Explanation:
Edible oils (liquid fats, containing unsaturated fatty acids) are converted into solid fats (like vanaspati/vegetable ghee) through the process of catalytic hydrogenation. In this process, hydrogen gas is bubbled through the liquid oil at high temperature and pressure in the presence of a nickel catalyst. The hydrogen adds across the double bonds of unsaturated fatty acids, converting them to saturated fatty acids — making the oil solid at room temperature. Simple hydrogenation (option 4) without specifying the catalyst is incomplete; the industrial process specifically uses catalytic hydrogenation.

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