ECAT Chemistry Chapter 27 Environmental Chemistry Online Test With Answers

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ECAT Chemistry Chapter 27 Environmental Chemistry Online Test

Sr. # Questions Answers Choice
1 Soil remediation means To make it suitable for cultivation of crops To make it acidic To make it alkeline To add manure into it
2 One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks Blow air Add Na<sub>2</sub>CO<sub>3</sub> Use a specially made sorbent having flouring trapped in it Use a sorbent having Al<sub>2</sub>O<sub>3</sub>trapped in it
3 Ecology is a science of environment and deals specially with Stratosphere Biosphere Lithosphere Hydrosphere
4 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic It attaches to sulphur of the disulphide link Hg is a heavy metal Hg is liquid at room temperature Hg is non reactive chemically
5 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be Ag<sup>+</sup> Cu<sup>2+</sup> Al<sup>3+</sup> Si<sup>4+</sup>
6 Water which his considered to be safe for human consumption is known as Distilled water Contaminated water Potable water Rain water
7 What is the cause of water pollution Chemical and bacterial contents in live stock The spilled oil in rivers and ponds Wide spread use of pesticides All of the above
8 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution Live stock waste Agricultural pesticides Oil breaks and spills All of the above
9 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
10 Which is not the condition for the formation of smog There must be sufficient NO gas There must be sunlight to help photo chemical reaction to take place Air must be blowing swiftly There must be SO<sub>2</sub>in the air
11 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water SO<sub>2</sub> NO<sub>2</sub> CO A and b only
12 The pH of the rain water in areas where acid rain is the cause of pollution may be 6.5 5.6 4.5 2.2
13 NO and NO2gases in atmosphere are represented by NO NO<sub>4</sub> NO<sub>x</sub> N<sub>x</sub>O<sub>y</sub>
14 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as Environment Hydrosphere Pollutant Biosphere
15 The largest item which is recycled is Newspaper Plastic Aluminium Oil
16 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from 2 - 4 ppm 4 - 6 ppm 2 - 5 ppm 4 - 8 ppm
17 The toxic organic compounds and heavy metals and metalloids results in contamination of Surface water Ground water Both surface and ground water Neither surface nor ground waters
18 Polycyolic aromatic hydrocarbons are taught to be Disinfectant Carcinogenic Helpful Reactive
19 Which of the following human activities are contaminating surface and ground waters Pesticides Septic tanks Petroleum and natural gas production All of these
20 When chlorofluoro carbon are subjected to U.V. they form Cations Anions Free radicals None of these
21 Ozone in most of the tropical regions acts as a pollutant and causes Damages to eyes Aggravates asthma Chest discomfort All of these
22 The normal amount of overhead ozone is about 250 Du 300 DU 350 DU 400 DU
23 The amount of Si in the lithosphere is about 27.72% 30.35% 35.30% 40.21%
24 The amount of oxygen in the lithosphere is about 35.50% 40.60% 56.60% 50.50%
25 In the atmosphere, CO2is about 0.01% 0.03% 0.05% 0.09%
26 In the atmosphere, O2is about 10% 15% 21% 25%
27 The film forming components of paints are Resins Thinners Pigments Driers
28 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called Primary pollutant Secondary pollutant Tertiary pollutant None of these
29 Chromium (VI) is highly toxic and can cause Blindness Cancer Liver problems Blood problems
30 Which gasses are produced from landfills NH<sub>3</sub> H<sub>2</sub>S N<sub>2</sub> All of these
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