MDCAT Chemistry Chapter 20 Macromolecules MCQ's Test With Answers

MDCAT Chemistry Chapter 20 Macromolecules MCQ's Test

Sr. # Questions Answers Choice
1 Surface and ground water sources are contaminate by various human activity. which of the following is not a human activity that causes contamination in fresh water?
 rain <br> live stock waste <br> oil leaks and&nbsp; spills <br> disposal of industrial effluents <br>
2 CFCs destroy ozone layer, How many ozone molecule a chlorine free radical can destroy:
 50,000 100,00 20,000 10,000
3 Which of the following wast material is not recycled for use again?
 glasses <br> paper <br> plastic toys <br> hides of animals <br>
4 Choose the chief air pollutant among the following which depletes ozone layer:
 carbon monoxide <br> carbon dioxide <br> chloroflurocarbons and nitrogen oxides <br> sulphur dioxide <br>
5 SO2 and NO2 cause pollution due to increase in:
 buffer action <br> basicity <br> acidity <br> neutrality <br>
6 Which is unnecessary for purification of water for drink purposes:
 coagulation <br> aeration <br> treatment with lodine <br> treatment with chlorine <br>
7 Which one of the following is not a component of environment:
 biosphere <br> stratosphere <br> hydrosphere <br> lithosphere <br>
8 Which factor is helping to reduce the environmental pollution:
 urbanization <br> industrialization <br> increases of plantation <br> rapid growth of population <br>
9 A sing chlorine free radical can destroy how many ozone molecules:
 10 100 1000 10000
10 New3spapers can be recycled again and again by how many times?
 5 3 2 4
11 Fungicides re the pesticides which:
 kill plants <br> kill herbs <br> kill insects <br> control the growth of fungus <br>
12 What is the effect of polluted air on environment:
 ozone <br> acid rain<br> global&nbsp; warming <br> smog <br>
13 The gasses 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 <br> to destroy nitrogen oxide form the atmosphere <br> to help to clean to atmosphere <br> to help in fixing of bacteria <br>
14 In big/metropolitan cities, atmosphere is mostly polluted due to:
 radioactive fall out <br> household waste <br> pesticide residue <br> automobile exhausts <br>
15 The reason of acid rain is:
 release of CO in excess by in complete combustion<br> excess release of NO<sub>2</sub> and SO<sub>2</sub> from burning of fossil fuels<br> Formation of NH<sub>3</sub> in excess form industry and coal gas <br> Formation of excess CO<sub>2</sub> due to combustion and respiration <br>
16 Cyclone collector is used to reduce:
 noise pollution <br> air pollution <br> water pollution <br> radioactive pollution <br>
17 The pH range of the acid rain is:
 6.5 __ 6<br> Less than 5<br> 8 __ 7.5 <br> 7 __ 6.5<br>
18 Proxy acetyl nitrat5e (PAN) is an irritant to human beings and it affects:
 nose <br> stomach <br> eyes <br> ears <br>
19 Ecosytem is a smaller unity of:
 nydosphere <br> biosphere <br> lithosphere <br> atmosphere <br>
20 The temperature in the incineration of industrial and hazardons waster process had a range:
 950 to 1300°C<br> 500 to 900°C<br> 250 to 500°C<br> 900 to 1000°C<br>
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