Question

Supported nickel catalyst is more reactive than Raney nickel and usually effective at a lower temperature for hydrogenation.
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Answer 1

Hint: Catalysts are defined in chemistry as substances that change the rate of a reaction by changing the path of the reaction. A catalyst is typically used to accelerate or increase the rate of a reaction. Catalysts, on the other hand, are used to break or rebuild the chemical bonds that exist between the atoms in the molecules of various elements or compounds.

Complete answer:
Catalysts made of nickel. Because of their ability to rupture \[C-C\] bonds, nickel-based catalysts are the most commonly used in reforming reactions. Because of its ability to withstand reaction conditions, nickel has generally been supported onto alumina.
Raney nickel, also known as spongy nickel, is a fine-grained solid composed primarily of nickel derived from an alloy of nickel and aluminum. There are several grades, the majority of which are gray solids. Some are pyrophoric, but the majority are air-stable slurries.
 Hydrogenation is a chemical reaction that occurs when molecular hydrogen (\[{{H}_{2}}\]) reacts with another compound or element, typically in the presence of a catalyst such as nickel, palladium, or platinum.
Hydrogenation breaks down hydrocarbon double and triple bonds. Platinum, palladium, rhodium, and ruthenium combine to form highly active catalysts that operate at lower \[{{H}_{2}}\] temperatures and pressures. Non-precious metal catalysts, particularly those based on nickel (such as Raney nickel and Urushibara nickel), have also been developed, but they are typically slower or require higher temperatures. Raney-nickel catalyzed hydrogenation reactions at very high pressures.
Supported nickel catalyst is more reactive than Raney nickel and usually effective at a lower temperature for hydrogenation.

Note:
In the industry, hydrogenation is widely used. Many products, raw materials, or ingredients are solidified, preserved, or purified using hydrogenation. Hydrogen, which is commonly used as a reducing agent, will lose an electron in a chemical redox reaction. When it reacts with metals, however, it acts as an oxidizing agent.