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Which is the active catalyst for hydrogenation of lauryl ester?

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Which is the active catalyst for hydrogenation of lauryl ester?

(a) Nickel

(b) Copper-ammonium chromate

(c) Aluminium oxide

(d) Potassium permanganate

I had been asked this question by my college professor while I was bunking the class.

This interesting question is from Industrial Processes-II topic in division Hydrogenation of Unit Processes

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Correct option is (b) Copper-ammonium chromate

To elaborate: An active catalyst for hydrogenating the lauryl ester of coconut oil fatty acid is made by decomposing copper-ammonium chromate at 350-400°C.

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