MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test With Answers

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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following waste material is not recycled for use again Glasses Paper Plastic toys Hides of animals
2 Choose the chief air pollutant among the following which depletes ozone layer Carbon monoxide Carbon dioxide Chloroflurocarbons and nitrogen oxides Sulphur dioxide
3 SO2and NO2cause pollution due to increase in Buffer action Basicity Acidity Neutrality
4 Why is carbon monoxide called as pollutant? The reason is that It combines with oxygen It combines with haemoglobin It inactivates glycolysis It inactivates nerves
5 Which is unnecessary for purification of water for drinking purposes Coagulation Aeration Treatment with Iodine Treatment with chlorine
6 Which one of the following is not a component of environment Biosphere Stratosphere Hydrosphere Lithosphere
7 Which factor is helping to reduce the environmental pollution Urbanization Industrialization Increase of plantation Rapid growth of population
8 A single chlorine free radical can destory how many ozone molecules 10 100 1000 10000
9 Newspapers can be recycled again and again by how many times 5 2 4 3
10 Fungicides are the pesticides which Kill plants Kill herbs Kill insects Control the growth of fungus
11 What is the effect of polluted air on environment Ozone Acid rain Global warming Smog
12 The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required To help plant to under go photosynthesis To destroy nitrogen oxide from the atmosphere To help to clean the atmosphere To help in fixing of bacteria
13 In big/metropolitan cities, atmosphere is mostly polluted due to Radioactive fall out Household waste Pesticide residue Automobile exhausts
14 The reason of acid rains is Release of CO in excess by in complete combustion Excess release of NO<sub>2</sub>and SO<sub>2</sub>from buring of fossil fules Formation of excess CO<sub>2</sub>due to combustion and respiration Formation of NH<sub>3</sub>in excess from industry and coal gas
15 Cyclone collector is used to reduce Noise pollution Air pollution Water pollution Radioactive pollution
16 The pH range of the acid rain is 6.5 - 6 Less than 5 8 - 7.5 7 - 6.5
17 Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect Nose Stomach Eyes Ears
18 Ecosystem is a smaller unity of Nydosphere Biosphere Lithosphere Attmosphere
19 The temperature in the incineration of industrial and hazardons waster process had a range 950 to 1300°C 500 to 900°C 250 to 500°C 900 to 1000°C
20 Choose the correct statements SO<sub>2</sub>affects the nucleus SO<sub>2</sub>affects plasmodesmata SO<sub>2</sub>affects cell wall SO<sub>2</sub>affects all membrane systems
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