(a) How many alkenes yield 2,2,3,4,4-pentamethylpentane on catalytic hydrogenation? (b)

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Catalytic hydrogenation involves the hydrogen’s addition of hydrogen to unsaturated compounds in a catalyst’s presence. It assists in pi-bonds’ saturation in unsaturated hydrocarbons. The metallic catalysts (e.g., Pt or Pd) facilitate hydrogenation by providing a surface for hydrogen molecules to adsorb and react with the unsaturated substrate, resulting in the saturated compounds’ formation.