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How is Selective hydrogenations accomplished?

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How is Selective hydrogenations accomplished?

(a) Catalyst

(b) Temperature

(c) Pressure

(d) All of the mentioned

I had been asked this question in class test.

The doubt is from Hydrogenolysis Reactions topic in chapter Hydrogenation of Unit Processes

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Correct choice is (d) All of the mentioned

The explanation: Selective hydrogenations are accomplished either by making the proper choice of catalyst, temperature, pressure, and solvent (and thereby attaining a difference in reaction rate) or by interrupting the reaction when the desired amount of hydrogen has been absorbed.

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