Which of the following catalytic systems is used for the reduction of unsaturated hydrocarbon to saturated hydrocarbon?

  1. A. Copper and H_{2}
  2. B. Iron and H_{2}
  3. C. Zinc and H_{2}
  4. D. Nickel and H_{2}

Correct Answer: D. Nickel and H_{2}

Explanation

Catalytic hydrogenation of unsaturated hydrocarbons (like alkenes and alkynes) to saturated hydrocarbons (alkanes) is typically carried out using hydrogen gas (H_{2}) in the presence of finely divided metal catalysts such as Nickel, Palladium, or Platinum.

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