Multiple choice

_______is more or less free from the harmful metal lead.

  1. Petrol

  2. Unleaded petrol

  3. Diesel

  4. All the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Regular petrol historically contained lead additives (tetraethyl lead) to improve engine performance and prevent knocking. Unleaded petrol was specifically developed without these toxic lead compounds, making it safer for human health and the environment. Diesel is a different fuel altogether and is not the lead-free alternative to petrol.

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