Question 26
HydrocarbonsComplete hydrogenation of ethyne yields
- A.benzene
- B.methane
- C.ethane
- D.ethene
- E.propane
Show the answer and explanation
Answer: C (ethane)
Explanation
Ethyne adds two molecules of hydrogen: C2H2 + 2H2 → C2H6. Complete hydrogenation gives ethane; ethene is only the halfway product.