passwella.
Menu

JAMB Chemistry 1993 Question 43

Question 43

Petroleum and Coal

It is not desirable to use lead tetraethyl as an anti-knock agent because

  1. A.it is expensive
  2. B.of pollution effects from the exhaust fumes
  3. C.it lowers the octane rating of petrol
  4. D.it is explosive
Show the answer and explanation

Answer: B (of pollution effects from the exhaust fumes)

Explanation

Lead tetraethyl releases poisonous lead compounds into the air through car exhausts, which is why leaded petrol has been phased out.