ENVIRONMENTAL CHEMISTRY
1. Which of the following is not a greenhouse gas?
a) CO2
b)CH4
c)Chlorofluoro carbons
d)O2
Sol. D
2. Which detergents are used in hair conditioners?
a)Anionic
(b) Cationic
(c) Non ionic
(d) Synthetic
Sol. (b)
3. BOD is
(A) Waste decomposed in 5 days
(B) Oxygen used in 5 days
(C) Microorganisms killed in 5 days
(D) Dissolved oxygen left after 5 days
Sol. (b)
4. SO2 causes
(a) Respiratory and lung disease
(b) Acid rain
(c) Corrosion of building material
(d) All of the above
Sol. (d)
SO2 causes eye irritation, damages respiratory tract, produces asthma and bronchitis. It also causes acid rain and destroys materials.
5. Which of the following is present in maximum amount in acid rain?
a)HNO3
b)H2 SO 4
c)HCl
d)H2 CO 3
Sol. B
6. Aerosols present in air are
(a) Negatively charged
(b) Positively charged
(c) Neutral
(d) Combination of all of the above
Sol. (d)
Aerosols present in air may be neutral negatively charged of positively charged.
7. Which of the following is not involved in the formation of photochemical smog?
a)NO
b) O3
c)Cx Hy
d)SO2
Sol. d
8. Which of the following has greatest affinity for haemoglobin :
a) CO
b)NO
c)O2
d)CO2
Sol. b.
9. Pollutants released from iron and steel industry are
a) CO2,NO2,H2S
b)b) CO,CO2,SO2
c)CO2,SO3,NO2
d)CO2,NO and SO3
Sol. (b):
CO, CO2 and SO2 are released from iron and steel industries.
10. Which of the following is the coldest rexampleion?
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Thermosphere
Sol. (b):
11. Which of the following does not cause water pollution?
(a) Heavy metals such as Hg, Pb, Cd
(b) Detergents
(c) Chemical effluents
(d) Freons.
Sol. (d)
Freons only cause air pollution.
12. What is most harmful for life on globe?
(A) Deforestation
(B) Soil erosion
(C) Increasing desert
(D) Nuclear fall out
Sol. (d)
13. White lung cancer is caused by
(a) Paper
(b) Textiles
(c) Silica
(d) Asbestos
Sol. (b)
White lung cancer – by inhalation of cotton fibres.
14. Fluorosis, the base disease is caused by the presence of
(A) Pesticides in water
(B) Fluoridesis in water
(C) CO in air
(D) SO2 in air
Sol. (b)
15. Which of the following pollutants is not emitted during volcanic eruptions?
(a) SO2
(b) H2S
(c) Hydrocarbons
(d) CO
Sol (c)
Hydrocarbons are not emitted during volcanic eruptions
16. Which of the following is the uppermost rexampleion of the atmosphere?
(a) stratosphere
(b) Troposphere
(c) Exosphere
(d) Ionosphere
Sol (c)
17. The size of particulates of H2SO4 fog lies in the range
(a) 5 – 100 nm
(b) 100 – 500 nm
(c) 500 – 1000 nm
(d) 1000 – 10,000 nm
Sol (c)
18. Which of the following statement is false?
(a) London smog is oxidising in nature
(b) London smog contains H2SO4 droplets
(c) London smog is formed in winter
(d) London smog causes bronchitis
Sol (a)
19. Aerobic oxidation is caused by
(a) Aerobic bacteria in presence of excess of oxygen
(b) Aerobic bacteria in absence of oxygen
(c) Anaerobic bacteria in presence of oxygen
(d) Anaerobic bacteria in absence of oxygen.
Sol (a)
Aerobic oxidation is caused by aerobic bacteria in presence of O2.
20. Which of the following is not a greenhouse gas?
a) CO2
b)CH4
c) chlorofluorocarbons
d)O2
Sol (d)
21. Choose the wrong statement/s
(a) CO2 is responsible for greenhouse effect
(b) CO2 can absorb infrared radiation but does not allow them to pass through
(c) NO is less harmful than NO2
(d) Acid rain contains mainly HNO3
Sol (d)
22. Lake containing excess of nutritious substances are called
(a) Polluted Lakes
(b)Eutrophic Lakes
(c) Dead Lake
(d) Green Lake
Sol (b)
The excessive growth of algae and aquatic plants due to nutrients present in a lake is called eutrophication.
23. Ozone in the stratosphere is deleted by
(a) CF2Cl2
(b)C7F16
(c) C6H6Cl6
(d) C6H6
Sol (a)
24. Which of the following is responsible for eutrophication of lakes?
(a) Cl–
(b)Ca2+
(c) ClO–4
(d) PO3-4
Sol. (d)
Nitrogen and phosphorus fertilizers which are drained from agricultural lands into water bodies cause eutrophication
25. The smog is essentially caused by the presence of
(A) O2 and O3
(B) O2 and N2
(C) Oxidise of sulphur and nitrogen
(D) O3 and N2
Sol. C
26. Ultraviolet radiation is absorbed by
(a) Exosphere
(b) ionosphere
(c) ozonosphere
(d) Stratosphere
Sol. (d)
UV radiations are absorbed in stratosphere.
27. Environmental pollution affects
(a) Biotic components
(b) Human beings only
(c) Plants only
(d) Biotic and abiotic components of environment
Sol. (d)
Environmental pollution affects biotic and abiotic components of environment.
