Nickel is used as a catalyst in the hydrogenation of vegetable oils. Which property of nickel makes it suitable for this role?

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Question

Nickel is used as a catalyst in the hydrogenation of vegetable oils. Which property of nickel makes it suitable for this role?

Accepted Answer

B. Its variable oxidation states allow it to facilitate bond breaking — Nickel acts as a heterogeneous catalyst by adsorbing hydrogen and C=C double bonds onto its surface, weakening these bonds and facilitating the addition reaction. The ability to change oxidation state and interact with reactant molecules through adsorption is the key catalytic property of transition metals.

Answer

B. Its variable oxidation states allow it to facilitate bond breaking

Answer

A. Its high density allows it to sink into the oil

Answer

C. It is the only metal that can bond with hydrogen gas

Answer

D. Its low melting point allows it to mix with the oil

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