An industrial chemist is producing margarine by partial hydrogenation of sunflower oil. The reaction conditions are: nickel catalyst, 200°C, and hydrogen gas at moderate pressure.

Which statement explains why partial hydrogenation is preferred to complete hydrogenation?

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Question

An industrial chemist is producing margarine by partial hydrogenation of sunflower oil. The reaction conditions are: nickel catalyst, 200°C, and hydrogen gas at moderate pressure.

Which statement explains why partial hydrogenation is preferred to complete hydrogenation?

Accepted Answer

Partial hydrogenation produces a spreadable solid at room temperature — Award 1 mark for recognising that partial hydrogenation produces a product with suitable texture and spreadability. A is incorrect — complete hydrogenation would produce a very hard solid. C is incorrect — both processes use similar temperatures. D is incorrect — catalyst usage is not the primary consideration.

Answer

Partial hydrogenation produces a spreadable solid at room temperature

Answer

Complete hydrogenation would produce a liquid product

Answer

Complete hydrogenation requires higher temperatures

Answer

Partial hydrogenation uses less nickel catalyst

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