1 |
In purification of potable water the coagulant used is |
Nickle sulpahte
Copper sulpahte
Barium sulpahte
Alum
|
2 |
Which is not a method for solid waste management |
Landfill
Incinerating
Recycling
None of these
|
3 |
Ecosystem is a smaller unit of |
Hydrosphere
Lithosphere
Biosphere
Atmosphere
|
4 |
Fungicides are the pesticides which |
Control the growth of fungus
Kill insects
Kill plants
Kill herbs
|
5 |
A single chlorine free radical can destroy how many ozone molecules |
100
100000
10000
10
|
6 |
Which heavy metals do not have any safe limits |
As
Hg
Cr
All of these
|
7 |
SO2Makes ______ acid rains |
Carbonic acid
Sulfuric
Nitric acid
All of these
|
8 |
The pH range of the acid rain is |
8 - 7
7 - 6.5
6.5 - 6
Less than 5
|
9 |
Which of the following waste material is not recycled for use again |
Paper
Plastic
Hides of animals
Glass
|
10 |
In incinerating the waste is burnt at |
1000°C
100°C
2000°C
1500°C
|
11 |
Chromium (VI) is highly toxic and can cause |
Blindness
Cancer
Liver problems
Blood problems
|
12 |
Industrial effuents have toxic synthetic organic compounds as well as heavy metals like |
Pb
Cr
Hg
All of these
|
13 |
Which step is unnecessary for purification of water for drinking purposes |
Aeration
Coagulation
Treatment with chlorine
Treatment with iodine
|
14 |
Potable water is considered to be |
Safe for human consumption
Not safe for human consumption
The surface water
The ground water
|
15 |
Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water |
Low value
Higher value
Both values
None of these
|
16 |
Exposure to CO results in |
Headache
Fatigue
Unconsciousness
All of these
|
17 |
Which gas is not a constituent of atmosphere |
Xe
O<sub>3</sub>
H<sub>2</sub>
F<sub>2</sub>
|
18 |
Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water |
Live stock waste
Oil leaks and spills
Disposal of industrial effluents
Rain
|
19 |
CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy |
10,000
20,000
100,000
50,000
|
20 |
Which is not the affect of polluted air on environment |
Acid rain
Smog
Ozone
Global warming
|
21 |
Which one of the following is not air pollutant gas |
CO
CO<sub>2</sub>
NO
SO<sub>2</sub>
|
22 |
Which factor is helping to reduce the environmental pollution |
Rapid growth of population
Urbanization
Industrialization
Increase of plantation
|
23 |
A pollutant affects |
Human health
Quality of life
Functioning of ecosystem
All of these
|
24 |
The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount |
Iodine
Bromine
Lead
Carbon
|
25 |
The region of earth capable of supporting life is |
Hydrosphere
Lithosphere
Biosphere
Atmosphere
|
26 |
Oceans cove ______ percent of the surface of the earth |
60
70
80
97
|
27 |
The % of CO2is the atmosphere is |
3.0%
0.03%
0.3%
0.5%
|
28 |
Which is not a component of environment |
Biosphere
Lithospahre
Hydrosphere
None of these
|