UGC NET Computer Science December 2019 | Question 39

Question 39

---

The most dominant source of Benzene emissions in ambient air is

1. 1. Cement industry
2. 2. Cigarettes
3. 3. Car exhausts
4. 4. Paints and varnish

Explanation

The major sources of benzene exposure are tobacco smoke, automobile service stations, exhaust from motor vehicles, and industrial emissions; however, ingestion and dermal absorption of benzene can also occur through contact with contaminated water.
Benzene is present in both exhaust and evaporative emissions. Motor vehicles account for approximately 85% of the total benzene emissions. The remaining is attributed to stationary sources (15%). Benzene is a component of gasoline. Another important source of benzene in air is active smoking of tobacco.
High concentration of Benzene are encountered in the vicinity of petrol filling stations, fuel tank storage sites, coking plant in the vicinity of refineries. Major Benzene emission originates from the motor vehicles.
Car Exhausts are major source of Benzene emissions in ambient air in India.

So, option 3 is correct answer.

Previous	Next
UGC NET CS December 2019 - Question 38	UGC NET CS December 2019 - Question 40