1 |
B.O.D is connected with |
Organic matter
Microbes
Mircrobes and organic matter
None of the above
|
2 |
Drained sewage has B.O.D |
More than that of water
Less than that of water
Equal to that of water
None of the above
|
3 |
Drawback DDT as presticide is |
I becomes ineffective after some time
It is less effective than others
It is not easily/rapidly degraded in nature
Its high cost
|
4 |
Carbon monoxide is harmful to human beings as it |
Is carcinogenic
Is antagonistic to CO<sub>2</sub>
Has higher affinity for hemoglobin as compared to oxygen
Is destructive to O<sub>3</sub>
|
5 |
Air pollution is not caused by |
Pollen grains
Hydroelectric power
Industries
Automobiles
|
6 |
Which causes water pollution? |
Smoke/fly ash
Automobile exhausts
Aeroplnes
2,4-D and pesticides
|
7 |
Chief source of water and soil pollution is |
Mining
Thermal power plant
Agro-industry
All the above
|
8 |
Pollution is |
Removal of top soill
Release of toxic/undesirable materials in enevironment
Conversation of energy
All the above
|
9 |
Acid rain is due to increase in atmospheric concentration of |
Ozone and dust
CO<sub>2</sub>and CO
SO<sub>3</sub>and CO
SO<sub>2</sub>and NO<sub>2</sub>
|
10 |
Classical smog occurs in palces of |
Excess SO<sub>2</sub>
Low temperature
High temperature
Excess NH<sub>3</sub>
|
11 |
Shahi Qilla may be destroyed by |
Flood in Ravi
Temperature mediated spoilage of marble
Air pollutants from Lahore chemical industries
All the above
|
12 |
Ultraviolet radiation from sun causes a reaction that produces |
Fluorides
Carbon monoxide
Sulphur dioxide
Ozone
|
13 |
Which of the following forms a toxic substance in blood by combing with hemoglobin? |
Carbon dioxide
Carbon monoxide
Oxygen
Methane
|
14 |
Which one of the following dissolves more rapidly in blood hemoglobin than oxygen? |
Ozone
Nitrous oxide
Sulphure dioxide
Carbon monoxide
|
15 |
Ozone depletion in stratosphere shall result in |
Forest fires
Increased incidence of skin cancer
Global warming
None of the above
|
16 |
Increased asthmatic attacks in certain seasons are related to |
Inhalation of seasonal pollen
Eating of seasonal vegetables
Low temperature
Wet and dry environment
|
17 |
Domestic waste mostly constitutes |
Non-biodegradable pollution
Biodegradable pollution
Effluents
Air pollution
|
18 |
Burning of fossil fuels is the main source of pollution |
Nitrogen oxide
Nitric oxide
Nitrous oxide
Sulphur dioxide
|
19 |
Atomospheric pollutant is |
CO<sub>2</sub>
CO
O<sub>2</sub>
N<sub>2</sub>
|
20 |
Spraying of DDT produces pollution of |
Air
Air and water
Air and soil
Air, water and soil
|
21 |
Acid rains are produced by |
Excess NO<sub>2</sub>and SO<sub>2 </sub>from burining fossil fuels
Excess production of NH<sub>3</sub>by industry and coal gas
Excess release of carbon monoxide by incomplete combustion
Excess formation of CO<sub>2</sub>by combustion and animal respiration
|
22 |
Carbon monoxide is pollutant as it |
Inactivates nerves
Inhibits glycolysis
Combines with oxygen
Combines with hemoglobin
|
23 |
SO2and NO2produce pollution by increasing |
Alkalinity
Acidity
Neutrality
Buffer action
|
24 |
Pollutant of automobile exhausts that affects nervous system/produces mental diseases is |
Mercury
Lead
Nitrogen oxide
Sulphuric oxide
|
25 |
Sulphur dioxide affects |
Cell wall
Plasmodesmata
All membrane systems
Nucleus
|
26 |
Cyclone collector is used for minimizing |
Radioactive pollution
Air pollution
Noise pollution
Water pollution
|
27 |
Minamata disease is due to pollution of |
Organic waste into drinking water
Oil spill in water
Industrial waste containing mercury into fishing water
Arsenic into the atmosphere
|
28 |
Which one is not a pollutant normally? |
Hydrocarbons
Carbon dioxide
Carbon monoxide
Sulphur dioxide
|
29 |
Chief air pollutant which is likely to deplete ozone layer |
Sulphure dioxide
Carbon dioxide
Nitrogen oxides and chloro fluorocarbons
|
30 |
Atmosphere of big/metropolitan cities is polluted most by |
Automobile exhausts
Pesticide residue
Household waste
Radio-active fall out
|