Which plays an important role in depletion of ozone layer?
- Oxides of sulphur
- Oxides of carbon
- Oxides of nitrogen
- None of these
Submitted by :- Muhammad Nawaz
mnsoomro
Which of the following is the most hazardous metal pollutant of automobile exhaust?
- Lead
- Tin
- Cadmium
- Mercury
Submitted by :- Muhammad Nawaz
Which health effect is caused by lead?
- Neurotoxicity
- Cancer
- Hypertension
- Kidney damage.
Submitted by :- Muhammad Nawaz
Which statement is not related with nitric oxide?
- It is a colorless and odorless gas
- It is produced largely by fuel combustion
- It is a brown pungent gas
- It absorbs sun light and starts photochemical reactions
Submitted by :- Muhammad Nawaz
Which pollutant is not secondary pollutant?
- SO2
- NO2
- SO3
- Peroxyacetyl nitrate (PAN)
Submitted by :- Muhammad Nawaz
Which pollutant is not primary pollutant?
- Ash
- SO3
- Fumes
- Smoke
Submitted by :- Muhammad Nawaz
The reduction in ozone layer would lead to
- Temperature changes
- Increase in UV radiation on earth
- Cancer
- All of these
Submitted by :- Muhammad Nawaz
Chloroflororocarbons (CFC) are widely used as coolants in
- Air conditioners
- Aerosol propellants
- Clearing solvents
- All of these
Submitted by :- Muhammad Nawaz
Ozone filters out radiation below?
- 1000 Å
- 2000 Å
- 4000 Å
- 3000 Å
Submitted by :- Muhammad Nawaz
Which gas defends us form harmful effect of UV radiation?
A. O3
B. NO2
C. CO
D. SO₂
Submitted by :- Muhammad Nawaz