Question

which metal is used as a catalyst in the conversion of vegetable oil into fat​

Answer 1

The metal used is either of the following....
1- Nickle catalyst ,
2- Chromium catalyst

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Answer 2

By the process of hydrogenation, the vegetable oils are converted into fat components. The catalysts may be palladium, nickel of platinum.

The catalysts bring a quick chemical reaction with hydrogen and vegetable oils to convert these into fat components.

Therefore, with the treatment of hydrogen, the molecules undergo a chemical reaction giving a way for catalysts to change the form of oils into fat.