Question

Pollutant from motorcar exhaust that causes mental diseases is

• A. Pb
• B. NO${}_2$
• C. SO${}_2$
• D. Hg

Answer 1

The correct option is A Pb

Lead is the most hazardous metal pollutants of automobile exhausts. Its effects are lead poisoning, anaemia, kidney disease, convulsions and also causes brain damage in children. It also affects central nervous system and distorts the red blood corpuscles. About 150 to 400 mg of lead is stored in the body of an average adult and blood levels average about 25 mg/100 ml. Increase to 70 mg/100 ml of blood is generally associated with clinical symptoms.

Therefore, the correct answer is option A.