ECAT Chemistry Chapter 27 Environmental Chemistry Online Test With Answers

image
image
image

ECAT Chemistry Chapter 27 Environmental Chemistry Online Test

Sr. # Questions Answers Choice
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
Download This Set