Lead, ingested or inhaled is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning?
- Smelting units
- Pens and pencils
- Paints
- Hair oils and cosmetics
Detailed Explanation:
✅ Statement 1 – Correct: Smelting units release lead particles into air and soil during ore processing, making them a major source of environmental lead contamination.
❌ Statement 2 – Incorrect: Pencils contain graphite (carbon) and clay, not lead; the term "lead" is a historical misnomer.
✅ Statement 3 – Correct: Lead-based paints remain a significant hazard as deteriorating paint releases lead dust and chips that can be inhaled or ingested.
❌ Statement 4 – Incorrect: While some traditional cosmetics (surma/kohl) may contain lead, standard hair oils and modern cosmetics are not primary sources of lead poisoning.
Question 5 of 5 Heavy Metal Pollution
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