passwella.
Menu

JAMB Chemistry 1989 Question 42

Question 42

Hydrocarbons

When excess chlorine is mixed with ethene at room temperature, the product is

  1. A.1,2–dichloroethane
  2. B.1,2–dichloroethene
  3. C.1,1–dichloroethane
  4. D.1, 1–dichloroethene.
Show the answer and explanation

Answer: A (1,2–dichloroethane)

Explanation

Chlorine adds across the C=C double bond, one Cl on each carbon: CH2=CH2 + Cl2 → CH2Cl–CH2Cl, 1,2-dichloroethane.